images/balena-image-flasher: Install UEFI bootloader in the flasher b…

…oot partition

The UEFI firmware which comes in Jetpack 6 is at
a newer revision and has symlinks support to load the
kernel and dtb from the non-flasher rootfs.

Thus, with an updated bootloader which looks
for the flasher flag in the boot partition,
we can provision the internal medium using the
existing firmware in the QSPI.

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

layers/meta-balena-jetson/recipes-core/images/balena-image-flasher.bbappend

@@ -3,3 +3,8 @@ include balena-image.inc
 IMAGE_INSTALL:remove:jetson-orin-nx-xavier-nx-devkit="l4t-launcher-extlinux"
 IMAGE_INSTALL:append = "efitools-utils efibootmgr"
 
+BALENA_BOOT_PARTITION_FILES:append = " \
+    bootfiles/EFI/BOOT/BOOTAA64.efi:/EFI/BOOT/BOOTAA64.efi \
+    extra_uEnv.txt:/extra_uEnv.txt \
+"
+