leds: Don't allow brightness values greater than max_brightness

Since commit 4d71a4a12b13 ("leds: Add support for setting brightness in
a synchronous way") the value passed to brightness_set() is no longer
limited to max_brightness and can be different from the internally saved
brightness value.

Signed-off-by: Gabriele Mazzotta <[e-mail]>
Signed-off-by: Bryan Wu <[e-mail]>

drivers/leds/leds.h

···
 static inline void led_set_brightness_async(struct led_classdev *led_cdev,
 					enum led_brightness value)
 {
-	led_cdev->brightness = min(value, led_cdev->max_brightness);
+	value = min(value, led_cdev->max_brightness);
+	led_cdev->brightness = value;
 
 	if (!(led_cdev->flags & LED_SUSPENDED))
 		led_cdev->brightness_set(led_cdev, value);