Add gpio-leds device tree data to am335x-evmsk device to enable gpio
based user-leds (USR0, USR1, USR2 and USR3) present on am335x starter
kit.
Signed-off-by: AnilKumar Ch <anilkumar@ti.com>
Signed-off-by: Benoit Cousson <b-cousson@ti.com>