mediatek: add support for EROFS

Enable EROFS support for Mediatek targets.

Build system: x86/64
Run-tested: mediatek/filogic GL-MT3000

Signed-off-by: Andy Chiang <[email protected]>
Link: https://github.com/openwrt/openwrt/pull/20792
Signed-off-by: Christian Marangi <[email protected]>

target/linux/mediatek/image/Makefile

@@ -22,7 +22,7 @@ define Device/Default
   KERNEL_INITRAMFS = kernel-bin | lzma | \
 	fit lzma $$(KDIR)/image-$$(firstword $$(DEVICE_DTS)).dtb with-initrd
   KERNEL_LOADADDR = $(loadaddr-y)
-  FILESYSTEMS := squashfs
+  FILESYSTEMS := squashfs erofs
   DEVICE_DTS_DIR := $(DTS_DIR)
   NETGEAR_ENC_MODEL :=
   NETGEAR_ENC_REGION :=