dmaengine: xdmac: Add memset support
The XDMAC supports memset transfers, both over contiguous areas, and over discontiguous areas through a LLI. The current memset operation only supports contiguous memset for now, add some support for it. Scatter-gathered memset will come eventually. Signed-off-by: NMaxime Ripard <maxime.ripard@free-electrons.com> Signed-off-by: NVinod Koul <vinod.koul@intel.com>
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