configs: rockchip: enable gpio-leds driver for Radxa boards

Basically, Radxa's boards are intended to turn LEDs on at U-Boot.
enable gpio-leds driver and led command.

Signed-off-by: FUKAUMI Naoki <naoki@radxa.com>
Reviewed-by: Kever Yang <kever.yang@rock-chips.com>
11 files changed