net: mdio-octeon: use platform_{get,set}_drvdata()

Use the wrapper functions for getting and setting the driver data
using platform_device instead of using dev_{get,set}_drvdata()
with &pdev->dev, so we can directly pass a struct platform_device.
This is a purely cosmetic change.
Signed-off-by: Jingoo Han <jg1.han@samsung.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/phy/mdio-octeon.c

@@ -244,7 +244,7 @@ static int octeon_mdiobus_remove(struct platform_device *pdev)
 	struct octeon_mdiobus *bus;
 	union cvmx_smix_en smi_en;
 
-	bus = dev_get_drvdata(&pdev->dev);
+	bus = platform_get_drvdata(pdev);
 
 	mdiobus_unregister(bus->mii_bus);
 	mdiobus_free(bus->mii_bus);