dmaengine: dw-axi-dmac: set coherent mask

Add support for setting dma coherent mask, dma mask is set to 64 bit

Signed-off-by: Pandith N <pandith.n@intel.com>
Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>

Link: https://lore.kernel.org/r/20211001140812.24977-4-pandith.n@intel.com


Signed-off-by: Vinod Koul <vkoul@kernel.org>