[][Add initial mt7981 target support in SDK]

[Description]
Add initial mt7981 target support in SDK

[Release-log]
N/A

Change-Id: Id7b3e04856c2a26e030a83dbfb57779b815b173f
Reviewed-on: https://gerrit.mediatek.inc/c/openwrt/feeds/mtk_openwrt_feeds/+/5058341
diff --git a/target/linux/mediatek/mt7981/target.mk b/target/linux/mediatek/mt7981/target.mk
new file mode 100644
index 0000000..3aa38cb
--- /dev/null
+++ b/target/linux/mediatek/mt7981/target.mk
@@ -0,0 +1,11 @@
+ARCH:=aarch64
+SUBTARGET:=mt7981
+BOARDNAME:=MT7981
+CPU_TYPE:=cortex-a53
+FEATURES:=squashfs nand ramdisk
+
+KERNELNAME:=Image dtbs
+
+define Target/Description
+	Build firmware images for MediaTek MT7981 ARM based boards.
+endef