add gpio led uart

hc

2024-05-10 748e4f3d702def1a4bff191e0cf93b6a05340f01

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COMTREND AR-5387UN BOARD
M:    Álvaro Fernández Rojas <noltari@gmail.com>
S:    Maintained
F:    board/comtrend/ar-5387un/
F:    include/configs/comtrend_ar5387un.h
F:    configs/comtrend_ar5387un_ram_defconfig