add gpio led uart

hc

2024-05-10 748e4f3d702def1a4bff191e0cf93b6a05340f01

 kernel/arch/sparc/kernel/iommu_common.h
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@@ -48,6 +48,4 @@
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 	return iommu_is_span_boundary(entry, nr, shift, boundary_size);
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 }
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-#define SPARC_MAPPING_ERROR	(~(dma_addr_t)0x0)
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-
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 #endif /* _IOMMU_COMMON_H */