leds: Rename led_brightness_set() to led_set_brightness()

Rename leds external interface led_brightness_set() to led_set_brightness().
This is the second phase of the change to reduce confusion between the
leds internal and external interfaces that set brightness. With this change,
now the external interface is led_set_brightness(). The first phase renamed
the internal interface led_set_brightness() to __led_set_brightness().
There are no changes to the interface implementations.

Signed-off-by: Shuah Khan <shuahkhan@gmail.com>
Signed-off-by: Bryan Wu <bryan.wu@canonical.com>
diff --git a/drivers/leds/led-core.c b/drivers/leds/led-core.c
index 176961b..8a09c5f 100644
--- a/drivers/leds/led-core.c
+++ b/drivers/leds/led-core.c
@@ -103,7 +103,7 @@
 }
 EXPORT_SYMBOL(led_blink_set_oneshot);
 
-void led_brightness_set(struct led_classdev *led_cdev,
+void led_set_brightness(struct led_classdev *led_cdev,
 			enum led_brightness brightness)
 {
 	/* stop and clear soft-blink timer */
@@ -113,4 +113,4 @@
 
 	__led_set_brightness(led_cdev, brightness);
 }
-EXPORT_SYMBOL(led_brightness_set);
+EXPORT_SYMBOL(led_set_brightness);