add gpio led uart

hc

2024-05-10 748e4f3d702def1a4bff191e0cf93b6a05340f01

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P2771-0000 BOARD
M:    Stephen Warren <swarren@nvidia.com>
S:    Maintained
F:    board/nvidia/p2771-0000/
F:    include/configs/p2771-0000.h
F:    configs/p2771-0000-000_defconfig
F:    configs/p2771-0000-500_defconfig