add gpio led uart

hc

2024-05-10 748e4f3d702def1a4bff191e0cf93b6a05340f01

 kernel/arch/sparc/mm/Makefile
..
..
@@ -15,3 +15,6 @@
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 # Only used by sparc64
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 obj-$(CONFIG_HUGETLB_PAGE) += hugetlbpage.o
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+
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+# Only used by sparc32
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+obj-$(CONFIG_HIGHMEM)   += highmem.o