add gpio led uart

hc

2024-05-10 748e4f3d702def1a4bff191e0cf93b6a05340f01

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DEVKIT3250 BOARD
M:    Vladimir Zapolskiy <vz@mleia.com>
S:    Maintained
F:    board/timll/devkit3250/
F:    include/configs/devkit3250.h
F:    configs/devkit3250_defconfig