configs/raspberrypi2: install Raspberry Pi 2 rev 1.2 device-tree blob

This installs Raspberry Pi 2 Model B rev 1.2 device-tree blob.

Note: Raspberry Pi 2 Model B vev 1.2 switched to BCM2837[1][2].

[1]: https://www.raspberrypi.com/documentation/computers/raspberry-pi.html#flagship-series
[2]: https://www.raspberrypi.com/documentation/computers/processors.html#bcm2837

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

board/raspberrypi/readme.txt

@@ -95,6 +95,7 @@ After building, you should obtain this tree:
     +-- bcm2708-rpi-zero-w.dtb      [1]
     +-- bcm2710-rpi-zero-2-w.dtb    [1]
     +-- bcm2709-rpi-2-b.dtb         [1]
+    +-- bcm2710-rpi-2-b.dtb         [1]
     +-- bcm2710-rpi-3-b.dtb         [1]
     +-- bcm2710-rpi-3-b-plus.dtb    [1]
     +-- bcm2710-rpi-cm3.dtb         [1]

configs/raspberrypi2_defconfig

@@ -21,7 +21,7 @@ BR2_LINUX_KERNEL_DEFCONFIG="bcm2709"
 
 # Build the DTB from the kernel sources
 BR2_LINUX_KERNEL_DTS_SUPPORT=y
-BR2_LINUX_KERNEL_INTREE_DTS_NAME="broadcom/bcm2709-rpi-2-b"
+BR2_LINUX_KERNEL_INTREE_DTS_NAME="broadcom/bcm2709-rpi-2-b broadcom/bcm2710-rpi-2-b"
 
 BR2_LINUX_KERNEL_NEEDS_HOST_OPENSSL=y