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-bfin-v3.c b/drivers/spi/spi-bfin-v3.c
index 914f9fe..35f2db7 100644
--- a/drivers/spi/spi-bfin-v3.c
+++ b/drivers/spi/spi-bfin-v3.c
@@ -773,7 +773,7 @@
 static int bfin_spi_probe(struct platform_device *pdev)
 {
 	struct device *dev = &pdev->dev;
-	struct bfin_spi3_master *info = dev->platform_data;
+	struct bfin_spi3_master *info = dev_get_platdata(dev);
 	struct spi_master *master;
 	struct bfin_spi_master *drv_data;
 	struct resource *mem, *res;