add gpio led uart

hc

2024-05-10 748e4f3d702def1a4bff191e0cf93b6a05340f01

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ETHERNUT5 BOARD
M:    egnite GmbH <info@egnite.de>
S:    Maintained
F:    board/egnite/ethernut5/
F:    include/configs/ethernut5.h
F:    configs/ethernut5_defconfig