add gpio led uart

hc

2024-05-10 748e4f3d702def1a4bff191e0cf93b6a05340f01

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COREBOOT BOARD
M:    Simon Glass <sjg@chromium.org>
S:    Maintained
F:    board/coreboot/coreboot/
F:    include/configs/chromebook_link.h
F:    configs/coreboot-x86_defconfig