i2c: 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: Wolfram Sang <wsa@the-dreams.de>
diff --git a/drivers/i2c/busses/i2c-pca-platform.c b/drivers/i2c/busses/i2c-pca-platform.c
index aa00df1..39e2755 100644
--- a/drivers/i2c/busses/i2c-pca-platform.c
+++ b/drivers/i2c/busses/i2c-pca-platform.c
@@ -136,7 +136,7 @@
 	struct i2c_pca_pf_data *i2c;
 	struct resource *res;
 	struct i2c_pca9564_pf_platform_data *platform_data =
-				pdev->dev.platform_data;
+				dev_get_platdata(&pdev->dev);
 	int ret = 0;
 	int irq;