led: gpio: Sort include headers alphabetically

If the inlcude headers aren't sorted alphabetically, then the
logical choice is to append new ones, however that creates a
lot of potential for conflicts or duplicates because every change
will then add new includes in the same location.

Signed-off-by: Xiubo Li <Li.Xiubo@freescale.com>
Signed-off-by: Bryan Wu <cooloney@gmail.com>

diff --cc drivers/leds/leds-gpio-register.c
Simple merge

diff --cc drivers/leds/leds-gpio.c
Simple merge