rt2x00: Make rt2x00leds_register return void

rt2x00dev isn't interested in the rt2x00leds_register() value
anyway. So lets make it return void to even prevent people from
assuming there is anybody interested in the returnvalue.
Signed-off-by: NIvo van Doorn <IvDoorn@gmail.com>
Signed-off-by: NJohn W. Linville <linville@tuxdriver.com>

drivers/net/wireless/rt2x00/rt2x00leds.c

@@ -109,7 +109,7 @@ static int rt2x00leds_register_led(struct rt2x00_dev *rt2x00dev,
 	return 0;
 }
 
-int rt2x00leds_register(struct rt2x00_dev *rt2x00dev)
+void rt2x00leds_register(struct rt2x00_dev *rt2x00dev)
 {
 	char *trigger;
 	char dev_name[16];
@@ -117,7 +117,7 @@ int rt2x00leds_register(struct rt2x00_dev *rt2x00dev)
 	int retval;
 
 	if (!rt2x00dev->ops->lib->led_brightness)
-		return 0;
+		return;
 
 	snprintf(dev_name, sizeof(dev_name), "%s-%s",
 		 rt2x00dev->ops->name, wiphy_name(rt2x00dev->hw->wiphy));
@@ -161,11 +161,10 @@ int rt2x00leds_register(struct rt2x00_dev *rt2x00dev)
 			goto exit_fail;
 	}
 
-	return 0;
+	return;
 
 exit_fail:
 	rt2x00leds_unregister(rt2x00dev);
-	return retval;
 }
 
 static void rt2x00leds_unregister_trigger(struct rt2x00_trigger *trigger)

drivers/net/wireless/rt2x00/rt2x00lib.h

@@ -189,7 +189,7 @@ static inline void rt2x00rfkill_free(struct rt2x00_dev *rt2x00dev)
  */
 #ifdef CONFIG_RT2X00_LIB_LEDS
 void rt2x00leds_led_quality(struct rt2x00_dev *rt2x00dev, int rssi);
-int rt2x00leds_register(struct rt2x00_dev *rt2x00dev);
+void rt2x00leds_register(struct rt2x00_dev *rt2x00dev);
 void rt2x00leds_unregister(struct rt2x00_dev *rt2x00dev);
 void rt2x00leds_suspend(struct rt2x00_dev *rt2x00dev);
 void rt2x00leds_resume(struct rt2x00_dev *rt2x00dev);
@@ -199,9 +199,8 @@ static inline void rt2x00leds_led_quality(struct rt2x00_dev *rt2x00dev,
 {
 }
 
-static inline int rt2x00leds_register(struct rt2x00_dev *rt2x00dev)
+static inline void rt2x00leds_register(struct rt2x00_dev *rt2x00dev)
 {
-	return 0;
 }
 
 static inline void rt2x00leds_unregister(struct rt2x00_dev *rt2x00dev)