conf/layer: Specify boot partition files

and other boot related packages, so that they
are available to the meta-balena-bsp recipes too.

Signed-off-by: Alexandru Costache <alexandru@balena.io>

layers/meta-balena-raspberrypi/conf/layer.conf

@@ -9,6 +9,20 @@ BBFILE_PRIORITY_balena-raspberrypi = "1337"
 
 LAYERSERIES_COMPAT_balena-raspberrypi = "dunfell"
 
+SDIMG_KERNELIMAGE_raspberrypi  ?= "kernel.img"
+SDIMG_KERNELIMAGE_raspberrypi2 ?= "kernel7.img"
+SDIMG_KERNELIMAGE_raspberrypi3-64 ?= "kernel8.img"
+
+# Customize balenaos-img
+BALENA_IMAGE_BOOTLOADER_rpi = "bootfiles"
+BALENA_BOOT_PARTITION_FILES_rpi = " \
+    u-boot.bin:/${SDIMG_KERNELIMAGE} \
+    boot.scr:/boot.scr \
+    bootfiles:/ \
+"
+BALENA_BOOT_PARTITION_FILES_append_revpi-core-3 = " revpi-core-dt-blob-overlay.dtb:/dt-blob.bin"
+BALENA_BOOT_PARTITION_FILES_append_revpi-connect = " revpi-connect-dt-blob-overlay.dtb:/dt-blob.bin"
+
 # Add all the overlays available in kernel source code
 #
 # The files below come from kernel-source/arch/arm/boot/dts/overlays/, but without