[][openwrt][mt7988][bsp][Add mt7988 subtarget into OpenWRT]

[Description]
Add mt7988 subtarget into OpenWRT

[Release-log]
N/A

Change-Id: Ia9bd92d04bf7f74875db01ac6f8f130ac418f33d
Reviewed-on: https://gerrit.mediatek.inc/c/openwrt/feeds/mtk_openwrt_feeds/+/6653839
Build: srv_hbgsm110
diff --git a/target/linux/mediatek/mt7988/base-files/lib/preinit/98_10_mtk_failsafe_init b/target/linux/mediatek/mt7988/base-files/lib/preinit/98_10_mtk_failsafe_init
new file mode 100644
index 0000000..99c3978
--- /dev/null
+++ b/target/linux/mediatek/mt7988/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