sm8450-common: rootdir: Import kernel related scripts from LA.VENDOR.1.0.r1-15600-WAIPIO.0

Change-Id: I3a3f582550f668fced12e84d7ae0ddedac45d712

rootdir/bin/init.qti.write.sh

@@ -0,0 +1,27 @@
+#!/vendor/bin/sh
+#=============================================================================
+# Copyright (c) 2021 Qualcomm Technologies, Inc.
+# All Rights Reserved.
+# Confidential and Proprietary - Qualcomm Technologies, Inc.
+#=============================================================================
+
+write_with_check() {
+	local i=60
+	while [ $i -gt 0 ]
+	do
+		if [ -f "$1" ]; then
+			break
+		fi
+
+		sleep 1
+		i=$(($i-1))
+	done
+
+	if [ ! -f "$1" ]; then
+		exit 1
+	fi
+
+	echo $2 > $1
+}
+
+write_with_check "$1" "$2"