spi: rcar: Use devm_spi_register_master()

Use devm_spi_register_master() to make cleanup paths simpler.

Signed-off-by: Jingoo Han <jg1.han@samsung.com>
Signed-off-by: Mark Brown <broonie@linaro.org>

drivers/spi/spi-rspi.c

@@ -887,7 +887,6 @@ static int rspi_remove(struct platform_device *pdev)
 {
 	struct rspi_data *rspi = platform_get_drvdata(pdev);
 
-	spi_unregister_master(rspi->master);
 	rspi_release_dma(rspi);
 
 	return 0;
@@ -972,7 +971,7 @@ static int rspi_probe(struct platform_device *pdev)
 		goto error2;
 	}
 
-	ret = spi_register_master(master);
+	ret = devm_spi_register_master(&pdev->dev, master);
 	if (ret < 0) {
 		dev_err(&pdev->dev, "spi_register_master error.\n");
 		goto error2;