configs/raspberrypi4*: install Raspberry Pi 400 device-tree blob

This installs the device-tree blob for the Raspberry Pi 400.

Signed-off-by: Gaël PORTAY <gael.portay@rtone.fr>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>

board/raspberrypi/readme.txt

@@ -100,6 +100,7 @@ After building, you should obtain this tree:
     +-- bcm2710-rpi-3-b-plus.dtb    [1]
     +-- bcm2710-rpi-cm3.dtb         [1]
     +-- bcm2711-rpi-4-b.dtb         [1]
+    +-- bcm2711-rpi-400.dtb         [1]
     +-- bcm2711-rpi-cm4.dtb         [1]
     +-- bcm2712-rpi-5-b.dtb         [1]
     +-- boot.vfat

configs/raspberrypi4_64_defconfig

@@ -20,7 +20,7 @@ BR2_LINUX_KERNEL_DEFCONFIG="bcm2711"
 
 # Build the DTB from the kernel sources
 BR2_LINUX_KERNEL_DTS_SUPPORT=y
-BR2_LINUX_KERNEL_INTREE_DTS_NAME="broadcom/bcm2711-rpi-4-b"
+BR2_LINUX_KERNEL_INTREE_DTS_NAME="broadcom/bcm2711-rpi-4-b broadcom/bcm2711-rpi-400"
 
 BR2_LINUX_KERNEL_NEEDS_HOST_OPENSSL=y
 

configs/raspberrypi4_defconfig

@@ -20,7 +20,7 @@ BR2_LINUX_KERNEL_DEFCONFIG="bcm2711"
 
 # Build the DTB from the kernel sources
 BR2_LINUX_KERNEL_DTS_SUPPORT=y
-BR2_LINUX_KERNEL_INTREE_DTS_NAME="broadcom/bcm2711-rpi-4-b"
+BR2_LINUX_KERNEL_INTREE_DTS_NAME="broadcom/bcm2711-rpi-4-b broadcom/bcm2711-rpi-400"
 
 BR2_LINUX_KERNEL_NEEDS_HOST_OPENSSL=y