soc: tegra: fuse: Use dma_request_channel instead of __dma_request_channel()

The __dma_request_channel() prototype has been changed to help to do
device node validation, thus we can use dma_request_channel() instead
of __dma_request_channel() to keep kernel bisectable.
Signed-off-by: Baolin Wang <baolin.wang@linaro.org>
Signed-off-by: Vinod Koul <vkoul@kernel.org>

drivers/soc/tegra/fuse/fuse-tegra20.c

@@ -110,7 +110,7 @@ static int tegra20_fuse_probe(struct tegra_fuse *fuse)
 	dma_cap_zero(mask);
 	dma_cap_set(DMA_SLAVE, mask);
 
-	fuse->apbdma.chan = __dma_request_channel(&mask, dma_filter, NULL);
+	fuse->apbdma.chan = dma_request_channel(mask, dma_filter, NULL);
 	if (!fuse->apbdma.chan)
 		return -EPROBE_DEFER;