[][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/base-files/lib/preinit/98_10_mtk_failsafe_init b/target/linux/mediatek/mt7981/base-files/lib/preinit/98_10_mtk_failsafe_init
new file mode 100644
index 0000000..99c3978
--- /dev/null
+++ b/target/linux/mediatek/mt7981/base-files/lib/preinit/98_10_mtk_failsafe_init
@@ -0,0 +1,9 @@
+#!/bin/sh
+# Copyright (C) 2006-2015 OpenWrt.org
+# Copyright (C) 2010 Vertical Communications
+
+failsafe_mtk_init() {
+	/sbin/mtk_failsafe.sh
+}
+
+boot_hook_add failsafe failsafe_mtk_init