ARM: dma-mapping: use alloc, mmap, free from dma_ops
This patch converts dma_alloc/free/mmap_{coherent,writecombine} functions to use generic alloc/free/mmap methods from dma_map_ops structure. A new DMA_ATTR_WRITE_COMBINE DMA attribute have been introduced to implement writecombine methods. Signed-off-by: NMarek Szyprowski <m.szyprowski@samsung.com> Acked-by: NKyungmin Park <kyungmin.park@samsung.com> Acked-by: NArnd Bergmann <arnd@arndb.de> Tested-By: NSubash Patel <subash.ramaswamy@linaro.org>
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