spi: pl022: Use dma_request_chan() directly for channel request

dma_request_slave_channel_reason() is:
#define dma_request_slave_channel_reason(dev, name) \
	dma_request_chan(dev, name)

Signed-off-by: Peter Ujfalusi <peter.ujfalusi@ti.com>
Acked-by: Linus Walleij <linus.walleij@linaro.org>
Link: https://lore.kernel.org/r/20191113094256.1108-6-peter.ujfalusi@ti.com
Signed-off-by: Mark Brown <broonie@kernel.org>

drivers/spi/spi-pl022.c

@@ -1158,15 +1158,15 @@ static int pl022_dma_autoprobe(struct pl022 *pl022)
 	int err;
 
 	/* automatically configure DMA channels from platform, normally using DT */
-	chan = dma_request_slave_channel_reason(dev, "rx");
+	chan = dma_request_chan(dev, "rx");
 	if (IS_ERR(chan)) {
 		err = PTR_ERR(chan);
 		goto err_no_rxchan;
 	}
 
 	pl022->dma_rx_channel = chan;
 
-	chan = dma_request_slave_channel_reason(dev, "tx");
+	chan = dma_request_chan(dev, "tx");
 	if (IS_ERR(chan)) {
 		err = PTR_ERR(chan);
 		goto err_no_txchan;