revert r27341, it introduce wrong behaviour for other models

SVN-Revision: 27342

target/linux/ar71xx/base-files/etc/diag.sh

@@ -144,7 +144,7 @@ set_state() {
 		status_led_set_timer 50 50
 		;;
 	done)
-		status_led_off
+		status_led_on
 		;;
 	esac
 }