backlight: backlight: Drop backlight_put()

There are no external users of backlight_put(). Drop it and open code
the two users in backlight.c.
Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
Reviewed-by: Daniel Thompson <daniel.thompson@linaro.org>
Signed-off-by: Lee Jones <lee.jones@linaro.org>

drivers/video/backlight/backlight.c

@@ -718,7 +718,10 @@ EXPORT_SYMBOL(of_find_backlight);
 
 static void devm_backlight_release(void *data)
 {
-	backlight_put(data);
+	struct backlight_device *bd = data;
+
+	if (bd)
+		put_device(&bd->dev);
 }
 
 /**
@@ -746,7 +749,7 @@ struct backlight_device *devm_of_find_backlight(struct device *dev)
 		return bd;
 	ret = devm_add_action(dev, devm_backlight_release, bd);
 	if (ret) {
-		backlight_put(bd);
+		put_device(&bd->dev);
 		return ERR_PTR(ret);
 	}
 	return bd;

include/linux/backlight.h

@@ -388,16 +388,6 @@ static inline int backlight_disable(struct backlight_device *bd)
 	return backlight_update_status(bd);
 }
 
-/**
- * backlight_put - Drop backlight reference
- * @bd: the backlight device to put
- */
-static inline void backlight_put(struct backlight_device *bd)
-{
-	if (bd)
-		put_device(&bd->dev);
-}
-
 /**
  * backlight_is_blank - Return true if display is expected to be blank
  * @bd: the backlight device