Auto-mount /boot partition

board/raspi/post_build.sh

+#!/bin/sh
+
+mkdir -p $TARGET_DIR/boot
+

board/raspi/post_image.sh

 #!/bin/sh
 
-cp $BR2_EXTERNAL/board/raspi/boot/cmdline.txt  $BINARIES_DIR/rpi-firmware/cmdline.txt
-cp $BR2_EXTERNAL/board/raspi/boot/config.txt  $BINARIES_DIR/rpi-firmware/config.txt
+cp $BR2_EXTERNAL/board/raspi/boot/cmdline.txt $BINARIES_DIR/rpi-firmware/cmdline.txt
+cp $BR2_EXTERNAL/board/raspi/boot/config.txt $BINARIES_DIR/rpi-firmware/config.txt
 

board/raspi/rootfs_overlay/etc/fstab

+# <file system>	<mount pt>	<type>	<options>	<dump>	<pass>
+/dev/root	/		ext2	rw,noauto	0	1
+/dev/mmcblk0p1	/boot		vfat	defaults	0	0
+proc		/proc		proc	defaults	0	0
+devpts		/dev/pts	devpts	defaults,gid=5,mode=620	0	0
+tmpfs		/dev/shm	tmpfs	mode=0777	0	0
+tmpfs		/tmp		tmpfs	mode=1777	0	0
+tmpfs		/run		tmpfs	mode=0755,nosuid,nodev	0	0
+sysfs		/sys		sysfs	defaults	0	0

configs/raspi_defconfig

 BR2_TARGET_GENERIC_GETTY_PORT="ttyAMA0"
 BR2_SYSTEM_DHCP="eth0"
 BR2_ROOTFS_OVERLAY="$(BR2_EXTERNAL)/board/raspi/rootfs_overlay"
+BR2_ROOTFS_POST_BUILD_SCRIPT="$(BR2_EXTERNAL)/board/raspi/post_build.sh"
 BR2_ROOTFS_POST_IMAGE_SCRIPT="$(BR2_EXTERNAL)/board/raspi/post_image.sh"
 BR2_LINUX_KERNEL=y
 BR2_LINUX_KERNEL_CUSTOM_GIT=y