common: DMA-mapping: add per-buffer coherent mappings attributes
The DMA_ATTR_FORCE_COHERENT DMA attribute can be used to force a buffer
to be mapped as IO coherent.
The DMA_ATTR_FORCE_NON_COHERENT DMA attribute can be used to force a
buffer to not be mapped as IO coherent.
Change-Id: Id80d77a5ccd797eec36b45b320423fb46c9f5861
Signed-off-by:
Liam Mark <lmark@codeaurora.org>
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