leds: Fix reference to led_set_brightness() in doc

The referenced function led_classdev_brightness_set() never existed.

Fixes: 5ada28bf ("led-class: always implement blinking")
Signed-off-by: Thomas Weißschuh <linux@weissschuh.net>
Signed-off-by: Lee Jones <lee@kernel.org>
Link: https://lore.kernel.org/r/20230218-typo-led-set-v1-1-3c35362a2f2d@weissschuh.net

include/linux/leds.h

@@ -256,7 +256,7 @@ struct led_classdev *__must_check devm_of_led_get(struct device *dev,
  *
  * Note that if software blinking is active, simply calling
  * led_cdev->brightness_set() will not stop the blinking,
- * use led_classdev_brightness_set() instead.
+ * use led_set_brightness() instead.
  */
 void led_blink_set(struct led_classdev *led_cdev, unsigned long *delay_on,
 		   unsigned long *delay_off);