spi: use dev_get_platdata()

Use the wrapper function for retrieving the platform data instead of
accessing dev->platform_data directly.

Signed-off-by: Jingoo Han <jg1.han@samsung.com>
Signed-off-by: Mark Brown <broonie@linaro.org>
diff --git a/drivers/spi/spi-s3c24xx.c b/drivers/spi/spi-s3c24xx.c
index 68910b3..5d43a28 100644
--- a/drivers/spi/spi-s3c24xx.c
+++ b/drivers/spi/spi-s3c24xx.c
@@ -525,7 +525,7 @@
 	memset(hw, 0, sizeof(struct s3c24xx_spi));
 
 	hw->master = spi_master_get(master);
-	hw->pdata = pdata = pdev->dev.platform_data;
+	hw->pdata = pdata = dev_get_platdata(&pdev->dev);
 	hw->dev = &pdev->dev;
 
 	if (pdata == NULL) {