x-efi-systemd-microcode.wks.in: Respect ROOT_FSTYPE

Hardcoding the root filesystem type to ext4 can't work as the default
rootfs type is squashfs. This patch fixes it by reusing the filesystem
type from ROOT_FSTYPE.

Fixes: https://git.ostc-eu.org/OSTC/OHOS/meta-ohos/-/issues/143


Signed-off-by: Andrei Gherzan <andrei.gherzan@huawei.com>

meta-ohos-core/wic/x-efi-systemd-microcode.wks.in

@@ -16,7 +16,7 @@
 # |  |
 # 0  4096KiB
 
-bootloader --ptable gpt --timeout=5 --append=" rootfstype=ext4 "
+bootloader --ptable gpt --timeout=5 --append=" rootfstype=${ROOT_FSTYPE} "
 
 part --source bootimg-efi --sourceparams="loader=systemd-boot,initrd=microcode.cpio" --label ${BOOT_PARTITION_LABEL} --align 4096 --fixed-size ${BOOT_PARTITION_SIZE} --active --offset 4096
 ${WIC_ROOTA_PARTITION}