dmaengine: sh: usb-dmac: Let the core do the device node validation

Let the DMA engine core do the device node validation instead of drivers.
Signed-off-by: Baolin Wang <baolin.wang@linaro.org>
Signed-off-by: Vinod Koul <vkoul@kernel.org>

drivers/dma/sh/usb-dmac.c

@@ -636,9 +636,6 @@ static bool usb_dmac_chan_filter(struct dma_chan *chan, void *arg)
 	struct usb_dmac_chan *uchan = to_usb_dmac_chan(chan);
 	struct of_phandle_args *dma_spec = arg;
 
-	if (dma_spec->np != chan->device->dev->of_node)
-		return false;
-
 	/* USB-DMAC should be used with fixed usb controller's FIFO */
 	if (uchan->index != dma_spec->args[0])
 		return false;
@@ -659,7 +656,8 @@ static struct dma_chan *usb_dmac_of_xlate(struct of_phandle_args *dma_spec,
 	dma_cap_zero(mask);
 	dma_cap_set(DMA_SLAVE, mask);
 
-	chan = dma_request_channel(mask, usb_dmac_chan_filter, dma_spec);
+	chan = __dma_request_channel(&mask, usb_dmac_chan_filter, dma_spec,
+				     ofdma->of_node);
 	if (!chan)
 		return NULL;