add gpio led uart

hc

2024-05-10 748e4f3d702def1a4bff191e0cf93b6a05340f01

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PEPPER BOARD
M:    Ash Charles <ash@gumstix.com>
S:    Maintained
F:    board/gumstix/pepper/
F:    include/configs/pepper.h
F:    configs/pepper_defconfig