dmaengine: xilinx_dma: Modify variable type to fix the incompatible warning

Modify the nr_channels variable type from int to u32 to fix
the incompatible parameter coverity warning.

Addresses-Coverity: Event incompatible_param.
Signed-off-by: NShravya Kumbham <shravya.kumbham@xilinx.com>

drivers/dma/xilinx/xilinx_dma.c

@@ -2921,7 +2921,8 @@ static int xilinx_dma_chan_probe(struct xilinx_dma_device *xdev,
 static int xilinx_dma_child_probe(struct xilinx_dma_device *xdev,
 				    struct device_node *node)
 {
-	int ret, i, nr_channels = 1;
+	int ret, i;
+	u32 nr_channels = 1;
 
 	ret = of_property_read_u32(node, "dma-channels", &nr_channels);
 	if (xdev->dma_config->dmatype == XDMA_TYPE_AXIMCDMA && ret < 0)