diff --git a/target/linux/ramips/dts/mt7621_ubnt_unifi-6-lite.dts b/target/linux/ramips/dts/mt7621_ubnt_unifi-6-lite.dts
new file mode 100644
index 0000000000..1e40a13079
--- /dev/null
+++ b/target/linux/ramips/dts/mt7621_ubnt_unifi-6-lite.dts
@@ -0,0 +1,83 @@
+// SPDX-License-Identifier: GPL-2.0-or-later OR MIT
+
+#include "mt7621_ubnt_unifi.dtsi"
+
+/ {
+	compatible = "ubnt,unifi-6-lite", "mediatek,mt7621-soc";
+	model = "Ubiquiti UniFi 6 Lite";
+
+	chosen {
+		bootargs-override = "console=ttyS0,115200";
+	};
+};
+
+&spi0 {
+	status = "okay";
+
+	flash@0 {
+		compatible = "mx25l25635f", "jedec,spi-nor";
+		reg = <0>;
+		spi-max-frequency = <50000000>;
+
+		partitions {
+			compatible = "fixed-partitions";
+			#address-cells = <1>;
+			#size-cells = <1>;
+
+			partition@0 {
+				label = "u-boot";
+				reg = <0x0 0x60000>;
+				read-only;
+			};
+
+			partition@60000 {
+				label = "u-boot-env";
+				reg = <0x60000 0x10000>;
+				read-only;
+			};
+
+			factory: partition@70000 {
+				label = "factory";
+				reg = <0x70000 0x40000>;
+				read-only;
+			};
+
+			eeprom: partition@80000 {
+				label = "eeprom";
+				reg = <0xb0000 0x10000>;
+				read-only;
+			};
+
+			partition@90000 {
+				label = "bs";
+				reg = <0xc0000 0x10000>;
+			};
+
+			partition@a0000 {
+				label = "cfg";
+				reg = <0xd0000 0x100000>;
+				read-only;
+			};
+
+			partition@1a0000 {
+				compatible = "denx,fit";
+				label = "firmware";
+				reg = <0x1d0000 0xf10000>;
+			};
+
+			partition@10d0000 {
+				label = "kernel1";
+				reg = <0x10e0000 0xf10000>;
+			};
+		};
+	};
+};
+
+&wlan_2g {
+	mtd-mac-address = <&eeprom 0x0>;
+};
+
+&wlan_5g {
+	mediatek,mtd-eeprom = <&factory 0x20000>;
+	mtd-mac-address = <&eeprom 0x6>;
+};
diff --git a/target/linux/ramips/dts/mt7621_ubnt_unifi-nanohd.dts b/target/linux/ramips/dts/mt7621_ubnt_unifi-nanohd.dts
index 4ba5f6a428..401868362e 100644
--- a/target/linux/ramips/dts/mt7621_ubnt_unifi-nanohd.dts
+++ b/target/linux/ramips/dts/mt7621_ubnt_unifi-nanohd.dts
@@ -1,49 +1,10 @@
 // SPDX-License-Identifier: GPL-2.0-or-later OR MIT
 
-#include "mt7621.dtsi"
-
-#include <dt-bindings/gpio/gpio.h>
-#include <dt-bindings/input/input.h>
+#include "mt7621_ubnt_unifi.dtsi"
 
 / {
 	compatible = "ubnt,unifi-nanohd", "mediatek,mt7621-soc";
 	model = "Ubiquiti UniFi nanoHD";
-
-	aliases {
-		led-boot = &led_white;
-		led-failsafe = &led_white;
-		led-running = &led_blue;
-		led-upgrade = &led_blue;
-		label-mac-device = &gmac0;
-	};
-
-	chosen {
-		bootargs = "console=ttyS0,115200";
-	};
-
-	leds {
-		compatible = "gpio-leds";
-
-		led_blue: dome_blue {
-			label = "blue:dome";
-			gpios = <&gpio 3 GPIO_ACTIVE_HIGH>;
-		};
-
-		led_white: dome_white {
-			label = "white:dome";
-			gpios = <&gpio 4 GPIO_ACTIVE_HIGH>;
-		};
-	};
-
-	keys {
-		compatible = "gpio-keys";
-
-		reset {
-			label = "reset";
-			gpios = <&gpio 12 GPIO_ACTIVE_LOW>;
-			linux,code = <KEY_RESTART>;
-		};
-	};
 };
 
 &spi0 {
@@ -109,40 +70,6 @@
 	};
 };
 
-&pcie {
-	status = "okay";
-};
-
-&pcie0 {
-	wifi@0,0 {
-		reg = <0x0 0 0 0 0>;
-		mediatek,mtd-eeprom = <&factory 0x0000>;
-	};
-};
-
-&pcie1 {
-	wifi@0,0 {
-		reg = <0x0 0 0 0 0>;
-		mediatek,mtd-eeprom = <&factory 0x8000>;
-	};
-};
-
-&gmac0 {
-	mtd-mac-address = <&eeprom 0x0>;
-};
-
-&switch0 {
-	ports {
-		port@0 {
-			status = "okay";
-			label = "lan";
-		};
-	};
-};
-
-&state_default {
-	gpio {
-		groups = "i2c", "uart2";
-		function = "gpio";
-	};
+&wlan_5g {
+	mediatek,mtd-eeprom = <&factory 0x8000>;
 };
diff --git a/target/linux/ramips/dts/mt7621_ubnt_unifi.dtsi b/target/linux/ramips/dts/mt7621_ubnt_unifi.dtsi
new file mode 100644
index 0000000000..e0625ba500
--- /dev/null
+++ b/target/linux/ramips/dts/mt7621_ubnt_unifi.dtsi
@@ -0,0 +1,81 @@
+// SPDX-License-Identifier: GPL-2.0-or-later OR MIT
+
+#include "mt7621.dtsi"
+
+#include <dt-bindings/gpio/gpio.h>
+#include <dt-bindings/input/input.h>
+
+/ {
+	aliases {
+		led-boot = &led_white;
+		led-failsafe = &led_white;
+		led-running = &led_blue;
+		led-upgrade = &led_blue;
+		label-mac-device = &gmac0;
+	};
+
+	chosen {
+		bootargs = "console=ttyS0,115200";
+	};
+
+	leds {
+		compatible = "gpio-leds";
+
+		led_blue: dome_blue {
+			label = "blue:dome";
+			gpios = <&gpio 3 GPIO_ACTIVE_HIGH>;
+		};
+
+		led_white: dome_white {
+			label = "white:dome";
+			gpios = <&gpio 4 GPIO_ACTIVE_HIGH>;
+		};
+	};
+
+	keys {
+		compatible = "gpio-keys";
+
+		reset {
+			label = "reset";
+			gpios = <&gpio 12 GPIO_ACTIVE_LOW>;
+			linux,code = <KEY_RESTART>;
+		};
+	};
+};
+
+&pcie {
+	status = "okay";
+};
+
+&pcie0 {
+	wlan_2g: wifi@0,0 {
+		reg = <0x0 0 0 0 0>;
+		mediatek,mtd-eeprom = <&factory 0x0>;
+	};
+};
+
+&pcie1 {
+	wlan_5g: wifi@0,0 {
+		reg = <0x0 0 0 0 0>;
+	};
+};
+
+&gmac0 {
+	mtd-mac-address = <&eeprom 0x0>;
+};
+
+&switch0 {
+	ports {
+		port@0 {
+			status = "okay";
+			label = "lan";
+		};
+	};
+};
+
+&state_default {
+	gpio {
+		groups = "i2c", "uart2";
+		function = "gpio";
+	};
+};
diff --git a/target/linux/ramips/image/mt7621.mk b/target/linux/ramips/image/mt7621.mk
index f6b72a699d..ca27b5e25e 100644
--- a/target/linux/ramips/image/mt7621.mk
+++ b/target/linux/ramips/image/mt7621.mk
@@ -1139,6 +1139,16 @@ define Device/ubnt_unifi-nanohd
 endef
 TARGET_DEVICES += ubnt_unifi-nanohd
 
+define Device/ubnt_unifi-6-lite
+  $(Device/dsa-migration)
+  DEVICE_VENDOR := Ubiquiti
+  DEVICE_MODEL := UniFi 6 Lite
+  DEVICE_PACKAGES += kmod-mt7603 kmod-mt7915e
+  KERNEL := kernel-bin | lzma | fit lzma $$(KDIR)/image-$$(firstword $$(DEVICE_DTS)).dtb
+  IMAGE_SIZE := 15424k
+endef
+TARGET_DEVICES += ubnt_unifi-6-lite
+
 define Device/unielec_u7621-06-16m
   $(Device/dsa-migration)
   $(Device/uimage-lzma-loader)
diff --git a/target/linux/ramips/mt7621/base-files/etc/board.d/02_network b/target/linux/ramips/mt7621/base-files/etc/board.d/02_network
index bca4cc23dc..cf8b9671f0 100755
--- a/target/linux/ramips/mt7621/base-files/etc/board.d/02_network
+++ b/target/linux/ramips/mt7621/base-files/etc/board.d/02_network
@@ -29,7 +29,8 @@ ramips_setup_interfaces()
 	tplink,re350-v1|\
 	tplink,re500-v1|\
 	tplink,re650-v1|\
-	ubnt,unifi-nanohd)
+	ubnt,unifi-nanohd|\
+	ubnt,unifi-6-lite)
 		ucidef_set_interface_lan "lan"
 		;;
 	gehua,ghl-r-001|\
diff --git a/target/linux/ramips/mt7621/config-5.4 b/target/linux/ramips/mt7621/config-5.4
index fbfb5b09f1..b2ad37510b 100644
--- a/target/linux/ramips/mt7621/config-5.4
+++ b/target/linux/ramips/mt7621/config-5.4
@@ -209,6 +209,7 @@ CONFIG_MTD_PHYSMAP=y
 CONFIG_MTD_RAW_NAND=y
 CONFIG_MTD_ROUTERBOOT_PARTS=y
 CONFIG_MTD_SPI_NOR=y
+CONFIG_MTD_SPLIT_FIT_FW=y
 CONFIG_MTD_SPLIT_MINOR_FW=y
 CONFIG_MTD_SPLIT_SEAMA_FW=y
 CONFIG_MTD_SPLIT_TPLINK_FW=y
diff --git a/target/linux/ramips/patches-5.4/0001-MIPS-cmdline-Clean-up-boot_command_line-initializati.patch b/target/linux/ramips/patches-5.4/0001-MIPS-cmdline-Clean-up-boot_command_line-initializati.patch
new file mode 100644
index 0000000000..eedc7498be
--- /dev/null
+++ b/target/linux/ramips/patches-5.4/0001-MIPS-cmdline-Clean-up-boot_command_line-initializati.patch
@@ -0,0 +1,192 @@
+From: Paul Burton <paul.burton@mips.com>
+Date: Wed, 9 Oct 2019 23:09:45 +0000
+Subject: MIPS: cmdline: Clean up boot_command_line initialization
+
+Our current code to initialize boot_command_line is a mess. Some of this
+is due to the addition of too many options over the years, and some of
+this is due to workarounds for early_init_dt_scan_chosen() performing
+actions specific to options from other architectures that probably
+shouldn't be in generic code.
+
+Clean this up by introducing a new bootcmdline_init() function that
+simplifies the initialization somewhat. The major changes are:
+
+- Because bootcmdline_init() is a function it can return early in the
+  CONFIG_CMDLINE_OVERRIDE case.
+
+- We clear boot_command_line rather than inheriting whatever
+  early_init_dt_scan_chosen() may have left us. This means we no longer
+  need to set boot_command_line to a space character in an attempt to
+  prevent early_init_dt_scan_chosen() from copying CONFIG_CMDLINE into
+  boot_command_line without us knowing about it.
+
+- Indirection via USE_PROM_CMDLINE, USE_DTB_CMDLINE, EXTEND_WITH_PROM &
+  BUILTIN_EXTEND_WITH_PROM macros is removed; they seemingly served only
+  to obfuscate the code.
+
+- The logic is cleaner, clearer & commented.
+
+Two minor drawbacks of this approach are:
+
+1) We call of_scan_flat_dt(), which means we scan through the DT again.
+   The overhead is fairly minimal & shouldn't be noticeable.
+
+2) cmdline_scan_chosen() duplicates a small amount of the logic from
+   early_init_dt_scan_chosen(). Alternatives might be to allow the
+   generic FDT code to keep & expose a copy of the arguments taken from
+   the /chosen node's bootargs property, or to introduce a function like
+   early_init_dt_scan_chosen() that retrieves them without modification
+   to handle CONFIG_CMDLINE. Neither of these sounds particularly
+   cleaner though, and this way we at least keep the extra work in
+   arch/mips.
+
+Origin: upstream, https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=7784cac697351f0cc0a4bb619594c0c99348c5aa
+Signed-off-by: Paul Burton <paul.burton@mips.com>
+Cc: linux-mips@vger.kernel.org
+
+--- a/arch/mips/kernel/setup.c
++++ b/arch/mips/kernel/setup.c
+@@ -538,11 +538,88 @@ static void __init check_kernel_sections
+ 	}
+ }
+ 
+-#define USE_PROM_CMDLINE	IS_ENABLED(CONFIG_MIPS_CMDLINE_FROM_BOOTLOADER)
+-#define USE_DTB_CMDLINE		IS_ENABLED(CONFIG_MIPS_CMDLINE_FROM_DTB)
+-#define EXTEND_WITH_PROM	IS_ENABLED(CONFIG_MIPS_CMDLINE_DTB_EXTEND)
+-#define BUILTIN_EXTEND_WITH_PROM	\
+-	IS_ENABLED(CONFIG_MIPS_CMDLINE_BUILTIN_EXTEND)
++static void __init bootcmdline_append(const char *s, size_t max)
++{
++	if (!s[0] || !max)
++		return;
++
++	if (boot_command_line[0])
++		strlcat(boot_command_line, " ", COMMAND_LINE_SIZE);
++
++	strlcat(boot_command_line, s, max);
++}
++
++static int __init bootcmdline_scan_chosen(unsigned long node, const char *uname,
++					  int depth, void *data)
++{
++	bool *dt_bootargs = data;
++	const char *p;
++	int l;
++
++	if (depth != 1 || !data ||
++	    (strcmp(uname, "chosen") != 0 && strcmp(uname, "chosen@0") != 0))
++		return 0;
++
++	p = of_get_flat_dt_prop(node, "bootargs", &l);
++	if (p != NULL && l > 0) {
++		bootcmdline_append(p, min(l, COMMAND_LINE_SIZE));
++		*dt_bootargs = true;
++	}
++
++	return 1;
++}
++
++static void __init bootcmdline_init(char **cmdline_p)
++{
++	bool dt_bootargs = false;
++
++	/*
++	 * If CMDLINE_OVERRIDE is enabled then initializing the command line is
++	 * trivial - we simply use the built-in command line unconditionally &
++	 * unmodified.
++	 */
++	if (IS_ENABLED(CONFIG_CMDLINE_OVERRIDE)) {
++		strlcpy(boot_command_line, builtin_cmdline, COMMAND_LINE_SIZE);
++		return;
++	}
++
++	/*
++	 * If the user specified a built-in command line &
++	 * MIPS_CMDLINE_BUILTIN_EXTEND, then the built-in command line is
++	 * prepended to arguments from the bootloader or DT so we'll copy them
++	 * to the start of boot_command_line here. Otherwise, empty
++	 * boot_command_line to undo anything early_init_dt_scan_chosen() did.
++	 */
++	if (IS_ENABLED(CONFIG_MIPS_CMDLINE_BUILTIN_EXTEND))
++		strlcpy(boot_command_line, builtin_cmdline, COMMAND_LINE_SIZE);
++	else
++		boot_command_line[0] = 0;
++
++	/*
++	 * If we're configured to take boot arguments from DT, look for those
++	 * now.
++	 */
++	if (IS_ENABLED(CONFIG_MIPS_CMDLINE_FROM_DTB))
++		of_scan_flat_dt(bootcmdline_scan_chosen, &dt_bootargs);
++
++	/*
++	 * If we didn't get any arguments from DT (regardless of whether that's
++	 * because we weren't configured to look for them, or because we looked
++	 * & found none) then we'll take arguments from the bootloader.
++	 * plat_mem_setup() should have filled arcs_cmdline with arguments from
++	 * the bootloader.
++	 */
++	if (IS_ENABLED(CONFIG_MIPS_CMDLINE_DTB_EXTEND) || !dt_bootargs)
++		bootcmdline_append(arcs_cmdline, COMMAND_LINE_SIZE);
++
++	/*
++	 * If the user specified a built-in command line & we didn't already
++	 * prepend it, we append it to boot_command_line here.
++	 */
++	if (IS_ENABLED(CONFIG_CMDLINE_BOOL) &&
++	    !IS_ENABLED(CONFIG_MIPS_CMDLINE_BUILTIN_EXTEND))
++		bootcmdline_append(builtin_cmdline, COMMAND_LINE_SIZE);
++}
+ 
+ /*
+  * arch_mem_init - initialize memory management subsystem
+@@ -570,48 +647,12 @@ static void __init arch_mem_init(char **
+ {
+ 	extern void plat_mem_setup(void);
+ 
+-	/*
+-	 * Initialize boot_command_line to an innocuous but non-empty string in
+-	 * order to prevent early_init_dt_scan_chosen() from copying
+-	 * CONFIG_CMDLINE into it without our knowledge. We handle
+-	 * CONFIG_CMDLINE ourselves below & don't want to duplicate its
+-	 * content because repeating arguments can be problematic.
+-	 */
+-	strlcpy(boot_command_line, " ", COMMAND_LINE_SIZE);
+-
+ 	/* call board setup routine */
+ 	plat_mem_setup();
+ 	memblock_set_bottom_up(true);
+ 
+-#if defined(CONFIG_CMDLINE_BOOL) && defined(CONFIG_CMDLINE_OVERRIDE)
+-	strlcpy(boot_command_line, builtin_cmdline, COMMAND_LINE_SIZE);
+-#else
+-	if ((USE_PROM_CMDLINE && arcs_cmdline[0]) ||
+-	    (USE_DTB_CMDLINE && !boot_command_line[0]))
+-		strlcpy(boot_command_line, arcs_cmdline, COMMAND_LINE_SIZE);
+-
+-	if (EXTEND_WITH_PROM && arcs_cmdline[0]) {
+-		if (boot_command_line[0])
+-			strlcat(boot_command_line, " ", COMMAND_LINE_SIZE);
+-		strlcat(boot_command_line, arcs_cmdline, COMMAND_LINE_SIZE);
+-	}
+-
+-#if defined(CONFIG_CMDLINE_BOOL)
+-	if (builtin_cmdline[0]) {
+-		if (boot_command_line[0])
+-			strlcat(boot_command_line, " ", COMMAND_LINE_SIZE);
+-		strlcat(boot_command_line, builtin_cmdline, COMMAND_LINE_SIZE);
+-	}
+-
+-	if (BUILTIN_EXTEND_WITH_PROM && arcs_cmdline[0]) {
+-		if (boot_command_line[0])
+-			strlcat(boot_command_line, " ", COMMAND_LINE_SIZE);
+-		strlcat(boot_command_line, arcs_cmdline, COMMAND_LINE_SIZE);
+-	}
+-#endif
+-#endif
++	bootcmdline_init(cmdline_p);
+ 	strlcpy(command_line, boot_command_line, COMMAND_LINE_SIZE);
+-
+ 	*cmdline_p = command_line;
+ 
+ 	parse_early_param();
diff --git a/target/linux/ramips/patches-5.4/0002-MIPS-Always-define-builtin_cmdline.patch b/target/linux/ramips/patches-5.4/0002-MIPS-Always-define-builtin_cmdline.patch
new file mode 100644
index 0000000000..03124d07d1
--- /dev/null
+++ b/target/linux/ramips/patches-5.4/0002-MIPS-Always-define-builtin_cmdline.patch
@@ -0,0 +1,44 @@
+From b7340422cc16c5deff100812f38114bb5ec81203 Mon Sep 17 00:00:00 2001
+From: Paul Burton <paul.burton@mips.com>
+Date: Sat, 12 Oct 2019 20:43:36 +0000
+Subject: [PATCH] MIPS: Always define builtin_cmdline
+
+Commit 7784cac69735 ("MIPS: cmdline: Clean up boot_command_line
+initialization") made use of builtin_cmdline conditional upon plain C if
+statements rather than preprocessor #ifdef's. This caused build failures
+for configurations with CONFIG_CMDLINE_BOOL=n where builtin_cmdline
+wasn't defined, for example:
+
+   arch/mips/kernel/setup.c: In function 'bootcmdline_init':
+>> arch/mips/kernel/setup.c:582:30: error: 'builtin_cmdline' undeclared
+    (first use in this function); did you mean 'builtin_driver'?
+      strlcpy(boot_command_line, builtin_cmdline, COMMAND_LINE_SIZE);
+                                 ^~~~~~~~~~~~~~~
+                                 builtin_driver
+   arch/mips/kernel/setup.c:582:30: note: each undeclared identifier is
+    reported only once for each function it appears in
+
+Fix this by defining builtin_cmdline as an empty string in the affected
+configurations. All of the paths that use it should be optimized out
+anyway so the data itself gets optimized away too.
+
+Signed-off-by: Paul Burton <paul.burton@mips.com>
+Fixes: 7784cac69735 ("MIPS: cmdline: Clean up boot_command_line initialization")
+Reported-by: kbuild test robot <lkp@intel.com>
+Reported-by: Nathan Chancellor <natechancellor@gmail.com>
+Cc: linux-mips@vger.kernel.org
+---
+ arch/mips/kernel/setup.c | 2 ++
+ 1 file changed, 2 insertions(+)
+
+--- a/arch/mips/kernel/setup.c
++++ b/arch/mips/kernel/setup.c
+@@ -68,6 +68,8 @@ char __initdata arcs_cmdline[COMMAND_LIN
+ 
+ #ifdef CONFIG_CMDLINE_BOOL
+ static char __initdata builtin_cmdline[COMMAND_LINE_SIZE] = CONFIG_CMDLINE;
++#else
++static const char builtin_cmdline[] __initconst = "";
+ #endif
+ 
+ /*
diff --git a/target/linux/ramips/patches-5.4/0010-MIPS-add-bootargs-override-property.patch b/target/linux/ramips/patches-5.4/0010-MIPS-add-bootargs-override-property.patch
new file mode 100644
index 0000000000..c19a0fb480
--- /dev/null
+++ b/target/linux/ramips/patches-5.4/0010-MIPS-add-bootargs-override-property.patch
@@ -0,0 +1,63 @@
+From f15d27f9c90ede4b16eb37f9ae573ef81c2b6996 Mon Sep 17 00:00:00 2001
+From: David Bauer <mail@david-bauer.net>
+Date: Thu, 31 Dec 2020 18:49:12 +0100
+Subject: [PATCH] MIPS: add bootargs-override property
+
+Add support for the bootargs-override property to the chosen node
+similar to the one used on ipq806x or mpc85xx.
+
+This is necessary, as the U-Boot used on some boards, notably the
+Ubiquiti UniFi 6 Lite, overwrite the bootargs property of the chosen
+node leading to a kernel panic when loading OpenWrt.
+
+Signed-off-by: David Bauer <mail@david-bauer.net>
+---
+ arch/mips/kernel/setup.c | 30 ++++++++++++++++++++++++++++++
+ 1 file changed, 30 insertions(+)
+
+--- a/arch/mips/kernel/setup.c
++++ b/arch/mips/kernel/setup.c
+@@ -571,8 +571,28 @@ static int __init bootcmdline_scan_chose
+ 	return 1;
+ }
+ 
++static int __init bootcmdline_scan_chosen_override(unsigned long node, const char *uname,
++						   int depth, void *data)
++{
++	bool *dt_bootargs = data;
++	const char *p;
++	int l;
++
++	if (depth != 1 || !data || strcmp(uname, "chosen") != 0)
++		return 0;
++
++	p = of_get_flat_dt_prop(node, "bootargs-override", &l);
++	if (p != NULL && l > 0) {
++		strlcpy(boot_command_line, p, COMMAND_LINE_SIZE);
++		*dt_bootargs = true;
++	}
++
++	return 1;
++}
++
+ static void __init bootcmdline_init(char **cmdline_p)
+ {
++	bool dt_bootargs_override = false;
+ 	bool dt_bootargs = false;
+ 
+ 	/*
+@@ -586,6 +606,14 @@ static void __init bootcmdline_init(char
+ 	}
+ 
+ 	/*
++	 * If bootargs-override in the chosen node is set, use this as the
++	 * command line
++	 */
++	of_scan_flat_dt(bootcmdline_scan_chosen_override, &dt_bootargs_override);
++	if (dt_bootargs_override)
++		return;
++
++	/*
+ 	 * If the user specified a built-in command line &
+ 	 * MIPS_CMDLINE_BUILTIN_EXTEND, then the built-in command line is
+ 	 * prepended to arguments from the bootloader or DT so we'll copy them
