leds: leds-pca955x - Mark pca955x_led_set() static

Mark pca955x_led_set() as static
Signed-off-by: Sven Wegener <sven.wegener@stealer.net>
Signed-off-by: Richard Purdie <rpurdie@linux.intel.com>

drivers/leds/leds-pca955x.c

@@ -226,7 +226,7 @@ static void pca955x_led_work(struct work_struct *work)
 	pca955x_write_ls(pca955x->client, chip_ls, ls);
 }
 
-void pca955x_led_set(struct led_classdev *led_cdev, enum led_brightness value)
+static void pca955x_led_set(struct led_classdev *led_cdev, enum led_brightness value)
 {
 	struct pca955x_led *pca955x;