leds: leds-bcm63138: get rid of LED_OFF

The whole "enum led_brightness" is marked as obsolete. Replace it with a
(non-)zero check.
Reported-by: Pavel Machek <pavel@ucw.cz>
Signed-off-by: Rafał Miłecki <rafal@milecki.pl>
Signed-off-by: Pavel Machek <pavel@ucw.cz>

drivers/leds/blink/leds-bcm63138.c

@@ -113,8 +113,7 @@ static void bcm63138_leds_enable_led(struct bcm63138_leds *leds,
 {
 	u32 bit = BIT(led->pin);
 
-	bcm63138_leds_update_bits(leds, BCM63138_SW_DATA, bit,
-				  value == LED_OFF ? 0 : bit);
+	bcm63138_leds_update_bits(leds, BCM63138_SW_DATA, bit, value ? bit : 0);
 }
 
 /*