asus-laptop: make code static

This patch makes some needlessly global code static.
Signed-off-by: NAdrian Bunk <bunk@stusta.de>
Cc: Corentin Chary <corentincj@iksaif.net>
Signed-off-by: NLen Brown <len.brown@intel.com>

drivers/misc/asus-laptop.c

@@ -211,7 +211,7 @@ static struct workqueue_struct *led_workqueue;
 				     enum led_brightness value);	\
 	static void object##_led_update(struct work_struct *ignored);	\
 	static int object##_led_wk;					\
-	DECLARE_WORK(object##_led_work, object##_led_update);		\
+	static DECLARE_WORK(object##_led_work, object##_led_update);	\
 	static struct led_classdev object##_led = {			\
 		.name           = "asus:" ledname,			\
 		.brightness_set = object##_led_set,			\