DMA: PL330: Register the DMA controller with the generic DMA helpers

This patch registers the pl330 dma controller driver with the generic
device tree dma helper functions.

Signed-off-by: Padmavathi Venna <[e-mail]>
Acked-by: Arnd Bergmann <[e-mail]>
Signed-off-by: Vinod Koul <[e-mail]>

drivers/dma/pl330.c

···
 		pi->pcfg.data_bus_width / 8, pi->pcfg.num_chan,
 		pi->pcfg.num_peri, pi->pcfg.num_events);
 
+	ret = of_dma_controller_register(adev->dev.of_node,
+					 of_dma_pl330_xlate, pdmac);
+	if (ret) {
+		dev_err(&adev->dev,
+		"unable to register DMA to the generic DT DMA helpers\n");
+		goto probe_err2;
+	}
+
 	return 0;
 
 probe_err2:
···
 
 	if (!pdmac)
 		return 0;
+
+	of_dma_controller_free(adev->dev.of_node);
 
 	amba_set_drvdata(adev, NULL);