main/postmarketos-update-kernel: heimdall-isorec: use dtb (MR 1648)

Use the dtb-appended kernel file, e.g. postmarketos-exynos4-dtb instead
of postmarketos-exynos4, if it is available. This is needed to flash a
mainline kernel with appended dtb to isorec devices.

main/postmarketos-update-kernel/APKBUILD

 pkgname=postmarketos-update-kernel
-pkgver=0.0.3
+pkgver=0.0.4
 pkgrel=0
 pkgdesc="kernel updater script for postmarketOS"
 url="https://postmarketos.org"
@@ -12,4 +12,4 @@ package() {
 	install -Dm755 "$srcdir/update-kernel.sh" \
 		"$pkgdir/sbin/pmos-update-kernel"
 }
-sha512sums="6ff38c0d0a3b37b052c2cc1be61294079dd5c17e3b1b348f7b9865e83cf6b635fb192128d8a10a86c97ea708e73288ec3c5b3335348ff279ff4b8cace67c4c31  update-kernel.sh"
+sha512sums="17de682e88fec2632cb51c6b034e7b9c27e77736d5943906a57e276fb4c594af7af93e411e8cdb1ea2aeefb8d7f231408195102b02af3e8e55d594d1c812ff16  update-kernel.sh"

main/postmarketos-update-kernel/update-kernel.sh

@@ -9,6 +9,9 @@ case $1 in
 		;;
 esac
 
+# Declare used deviceinfo variables to pass shellcheck
+deviceinfo_append_dtb=""
+
 # shellcheck disable=SC1091
 . /etc/deviceinfo
 
@@ -23,8 +26,15 @@ case $METHOD in
 	heimdall-isorec)
 		KERNEL_PARTITION=$(findfs PARTLABEL="${deviceinfo_flash_heimdall_partition_kernel:?}")
 		INITFS_PARTITION=$(findfs PARTLABEL="${deviceinfo_flash_heimdall_partition_initfs:?}")
-		echo "Flashing kernel..."
-		dd if=/boot/vmlinuz-"$FLAVOR" of="$KERNEL_PARTITION" bs=1M
+
+		KERNEL="vmlinuz-$FLAVOR"
+		if [ "${deviceinfo_append_dtb}" = "true" ]; then
+			KERNEL="$KERNEL-dtb"
+		fi
+
+		echo "Flashing kernel ($KERNEL)..."
+		dd if=/boot/"$KERNEL" of="$KERNEL_PARTITION" bs=1M
+
 		echo "Flashing initramfs..."
 		gunzip -c /boot/initramfs-"$FLAVOR" | lzop | dd of="$INITFS_PARTITION" bs=1M
 		;;