dt-binding: dma: dw-axi-dmac: Add support for Intel KeemBay AxiDMA

Add support for Intel KeemBay AxiDMA to the dw-axi-dmac
Schemas DT binding.

Signed-off-by: Sia Jee Heng <jee.heng.sia@intel.com>
Reviewed-by: Eugeniy Paltsev <Eugeniy.Paltsev@synopsys.com>
Reviewed-by: Rob Herring <robh@kernel.org>
Link: https://lore.kernel.org/r/20210125013255.25799-11-jee.heng.sia@intel.com


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