Add a directory by kernel instead of a common root, add qnap-301w and rpi4 kernel 6.1 suppport

5.4/target/linux/ipq40xx/base-files/etc/init.d/done

@@ -0,0 +1,13 @@
+#!/bin/sh /etc/rc.common
+# Copyright (C) 2006 OpenWrt.org
+
+START=95
+boot() {
+	mount_root done
+	rm -f /sysupgrade.tgz && sync
+
+	# process user commands
+	[ -f /etc/rc.local ] && {
+		sh /etc/rc.local
+	}
+}