dmaengine: sprd: Optimize the sprd_dma_prep_dma_memcpy()
This is one preparation patch, we can use default DMA configuration to implement the device_prep_dma_memcpy() interface instead of issuing sprd_dma_config(). We will implement one new sprd_dma_config() function with introducing device_prep_slave_sg() interface in following patch. So we can remove the obsolete sprd_dma_config() firstly. Signed-off-by: NEric Long <eric.long@spreadtrum.com> Signed-off-by: NBaolin Wang <baolin.wang@linaro.org> Signed-off-by: NVinod Koul <vkoul@kernel.org>
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