add gpio led uart

hc

2024-05-10 748e4f3d702def1a4bff191e0cf93b6a05340f01

 kernel/kernel/time/timeconv.c
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@@ -1,3 +1,4 @@
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+// SPDX-License-Identifier: LGPL-2.0+
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 /*
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  * Copyright (C) 1993, 1994, 1995, 1996, 1997 Free Software Foundation, Inc.
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  * This file is part of the GNU C Library.