net: w5100: use dev_get_platdata()

Use the wrapper function for retrieving the platform data instead of
accessing dev->platform_data directly. This is a cosmetic change
to make the code simpler and enhance the readability.
Signed-off-by: Jingoo Han <jg1.han@samsung.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/ethernet/wiznet/w5100.c

@@ -622,7 +622,7 @@ static const struct net_device_ops w5100_netdev_ops = {
 
 static int w5100_hw_probe(struct platform_device *pdev)
 {
-	struct wiznet_platform_data *data = pdev->dev.platform_data;
+	struct wiznet_platform_data *data = dev_get_platdata(&pdev->dev);
 	struct net_device *ndev = platform_get_drvdata(pdev);
 	struct w5100_priv *priv = netdev_priv(ndev);
 	const char *name = netdev_name(ndev);