add gpio led uart

hc

2024-05-10 748e4f3d702def1a4bff191e0cf93b6a05340f01

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# Locally calculated
sha256 bd8ebcf7ce86f4b022a4e7ba6b1cc16ffc4022bb58c1910fe4ac96c88217e7ec gadgetfs-test.tar.bz2