ARM: dts: Add bcm2711-rpi-400.dts

Signed-off-by: Phil Elwell <phil@raspberrypi.com>

Author: pelwell

arch/arm/boot/dts/Makefile

@@ -12,6 +12,7 @@ dtb-$(CONFIG_ARCH_BCM2835) += \
 	bcm2710-rpi-3-b.dtb \
 	bcm2710-rpi-3-b-plus.dtb \
 	bcm2711-rpi-4-b.dtb \
+	bcm2711-rpi-400.dtb \
 	bcm2710-rpi-cm3.dtb \
 	bcm2711-rpi-cm4.dtb