spi: use platform_{get,set}_drvdata()

Use the wrapper functions for getting and setting the driver data using
platform_device instead of using dev_{get,set}_drvdata() with &pdev->dev,
so we can directly pass a struct platform_device.

Signed-off-by: Jingoo Han <jg1.han@samsung.com>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
diff --git a/drivers/spi/spi-davinci.c b/drivers/spi/spi-davinci.c
index 50b13c9..968e364 100644
--- a/drivers/spi/spi-davinci.c
+++ b/drivers/spi/spi-davinci.c
@@ -865,7 +865,7 @@
 		goto err;
 	}
 
-	dev_set_drvdata(&pdev->dev, master);
+	platform_set_drvdata(pdev, master);
 
 	dspi = spi_master_get_devdata(master);
 	if (dspi == NULL) {
@@ -1044,7 +1044,7 @@
 	struct spi_master *master;
 	struct resource *r;
 
-	master = dev_get_drvdata(&pdev->dev);
+	master = platform_get_drvdata(pdev);
 	dspi = spi_master_get_devdata(master);
 
 	spi_bitbang_stop(&dspi->bitbang);