dmaengine: vdma: Add Support for Xilinx AXI Central Direct Memory Access Engine

This patch adds support for the AXI Central Direct Memory Access
(AXI CDMA) core to the existing vdma driver, AXI CDMA is a
soft Xilinx IP core that provides high-bandwidth
Direct Memory Access(DMA) between a memory-mapped
source address and a memory-mapped destination address.

Signed-off-by: Kedareswara rao Appana <appanad@xilinx.com>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>

include/linux/dma/xilinx_dma.h

@@ -45,11 +45,13 @@ struct xilinx_vdma_config {
  * enum xdma_ip_type: DMA IP type.
  *
  * XDMA_TYPE_AXIDMA: Axi dma ip.
+ * XDMA_TYPE_CDMA: Axi cdma ip.
  * XDMA_TYPE_VDMA: Axi vdma ip.
  *
  */
 enum xdma_ip_type {
 	XDMA_TYPE_AXIDMA = 0,
+	XDMA_TYPE_CDMA,
 	XDMA_TYPE_VDMA,
 };