leds: leds-rb532: Fix checkpatch errors

Fixes the following issues:
ERROR: code indent should use tabs where possible
WARNING: please, no spaces at the start of a line
Signed-off-by: Sachin Kamat <sachin.kamat@linaro.org>
Signed-off-by: Bryan Wu <cooloney@gmail.com>

drivers/leds/leds-rb532.c

@@ -16,7 +16,7 @@
 #include <asm/mach-rc32434/rb.h>
 
 static void rb532_led_set(struct led_classdev *cdev,
-                          enum led_brightness brightness)
+			  enum led_brightness brightness)
 {
 	if (brightness)
 		set_latch_u5(LO_ULED, 0);