serial: at91: Use dmaengine_slave_config API

We are removing the dmaengine_device_control API, that shouldn't even have been
exposed in the first place. Change the callers to use the proper API.
Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/tty/serial/atmel_serial.c

@@ -862,9 +862,8 @@ static int atmel_prepare_tx_dma(struct uart_port *port)
 	config.dst_addr_width = DMA_SLAVE_BUSWIDTH_1_BYTE;
 	config.dst_addr = port->mapbase + ATMEL_US_THR;
 
-	ret = dmaengine_device_control(atmel_port->chan_tx,
-					DMA_SLAVE_CONFIG,
-					(unsigned long)&config);
+	ret = dmaengine_slave_config(atmel_port->chan_tx,
+				     &config);
 	if (ret) {
 		dev_err(port->dev, "DMA tx slave configuration failed\n");
 		goto chan_err;
@@ -1042,9 +1041,8 @@ static int atmel_prepare_rx_dma(struct uart_port *port)
 	config.src_addr_width = DMA_SLAVE_BUSWIDTH_1_BYTE;
 	config.src_addr = port->mapbase + ATMEL_US_RHR;
 
-	ret = dmaengine_device_control(atmel_port->chan_rx,
-					DMA_SLAVE_CONFIG,
-					(unsigned long)&config);
+	ret = dmaengine_slave_config(atmel_port->chan_rx,
+				     &config);
 	if (ret) {
 		dev_err(port->dev, "DMA rx slave configuration failed\n");
 		goto chan_err;