balena-image-flasher: Add back kernel to the boot partition for the TX2

Changelog-entry: balena-image-flasher: Add back kernel to the boot partition for the TX2
Signed-off-by: Alexandru Costache <[email protected]>

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

@@ -1,2 +1,6 @@
 include balena-image.inc
 
+BALENA_BOOT_PARTITION_FILES:append:jetson-tx2 = " \
+    ${KERNEL_IMAGETYPE}${KERNEL_INITRAMFS}-${MACHINE}.bin:/${KERNEL_IMAGETYPE} \
+    extlinux/extlinux.conf_flasher:/extlinux/extlinux.conf \
+"