add gpio led uart

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2024-05-10 748e4f3d702def1a4bff191e0cf93b6a05340f01

 kernel/arch/arm/mm/Makefile
..
..
@@ -19,6 +19,7 @@
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 obj-$(CONFIG_DEBUG_VIRTUAL)	+= physaddr.o
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 obj-$(CONFIG_ALIGNMENT_TRAP)	+= alignment.o
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+obj-$(CONFIG_HIGHMEM)		+= highmem.o
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 obj-$(CONFIG_HUGETLB_PAGE)	+= hugetlbpage.o
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 obj-$(CONFIG_ARM_PV_FIXUP)	+= pv-fixup-asm.o
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