leds: Rename led_set_brightness() to __led_set_brightness()

Rename leds internal interface led_set_brightness() to __led_set_brightness()
to reduce confusion between led_set_brightness() and the external interface
led_brightness_set(). led_brightness_set() cancels the timer and then calls
led_set_brightness().

Signed-off-by: Shuah Khan <shuahkhan@gmail.com>
Signed-off-by: Bryan Wu <bryan.wu@canonical.com>
diff --git a/drivers/leds/ledtrig-oneshot.c b/drivers/leds/ledtrig-oneshot.c
index 5c9edf7..5cbab41 100644
--- a/drivers/leds/ledtrig-oneshot.c
+++ b/drivers/leds/ledtrig-oneshot.c
@@ -63,9 +63,9 @@
 	oneshot_data->invert = !!state;
 
 	if (oneshot_data->invert)
-		led_set_brightness(led_cdev, LED_FULL);
+		__led_set_brightness(led_cdev, LED_FULL);
 	else
-		led_set_brightness(led_cdev, LED_OFF);
+		__led_set_brightness(led_cdev, LED_OFF);
 
 	return size;
 }