staging: iio: ad5933: use dev_get_platdata()

Use dev_get_platdata() for retrieving the platform data instead of
accessing dev->platform_data directly.
Signed-off-by: Alison Schofield <amsfield22@gmail.com>
Acked-by: Daniel Baluta <daniel.baluta@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/iio/impedance-analyzer/ad5933.c

@@ -699,7 +699,7 @@ static int ad5933_probe(struct i2c_client *client,
 				   const struct i2c_device_id *id)
 {
 	int ret, voltage_uv = 0;
-	struct ad5933_platform_data *pdata = client->dev.platform_data;
+	struct ad5933_platform_data *pdata = dev_get_platdata(&client->dev);
 	struct ad5933_state *st;
 	struct iio_dev *indio_dev;