mfd: 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: Lee Jones <lee.jones@linaro.org>
diff --git a/drivers/mfd/ab3100-core.c b/drivers/mfd/ab3100-core.c
index ddc669d..b348ae5 100644
--- a/drivers/mfd/ab3100-core.c
+++ b/drivers/mfd/ab3100-core.c
@@ -854,7 +854,7 @@
 {
 	struct ab3100 *ab3100;
 	struct ab3100_platform_data *ab3100_plf_data =
-		client->dev.platform_data;
+		dev_get_platdata(&client->dev);
 	int err;
 	int i;