iommu/vt-d: Remove unused dma_to_mm_pfn function
Remove dma_to_buf_pfn function, which is not used in the codebase. This was pointed by clang with the following warning: 'dma_to_mm_pfn' [-Wunused-function] static inline unsigned long dma_to_mm_pfn(unsigned long dma_pfn) ^ https://lore.kernel.org/r/YYhY7GqlrcTZlzuA@fedora drivers/iommu/intel/iommu.c:136:29: warning: unused function Signed-off-by: NMaíra Canal <maira.canal@usp.br> Reviewed-by: NNick Desaulniers <ndesaulniers@google.com> Signed-off-by: NLu Baolu <baolu.lu@linux.intel.com> Link: https://lore.kernel.org/r/20211217083817.1745419-4-baolu.lu@linux.intel.comSigned-off-by: NJoerg Roedel <jroedel@suse.de>
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