cobalt: migrate platform to common led helper functions

Signed-off-by: Michael Heimpold <mhei@heimpold.de>
Signed-off-by: Florian Fainelli <florian@openwrt.org>

git-svn-id: svn://svn.openwrt.org/openwrt/trunk@35662 3c298f89-4303-0410-b956-a3cf2f4a3e73

target/linux/cobalt/base-files/etc/diag.sh

 #!/bin/sh
-# Copyright (C) 2009-2011 OpenWrt.org
+# Copyright (C) 2009-2013 OpenWrt.org
 
-front_led=/sys/class/leds/qube::front
+. /lib/functions/leds.sh
+
+status_led="qube::front"
 
 set_state() {
-        case "$1" in
-                preinit)
-                        [ -d $front_led ] && {
-                                echo none > $front_led/trigger
-                                echo 255 > $front_led/brightness
-                        }
-                ;;
-                done)
-                        [ -d $front_led ] && {
-				echo 0 > $front_led/brightness
-                        }
-                ;;
-        esac
+	case "$1" in
+	preinit)
+		status_led_on
+		;;
+	done)
+		status_led_off
+		;;
+	esac
 }