net: fsl_pq_mdio: remove unnecessary dev_set_drvdata()

Unnecessary dev_set_drvdata() is removed, because the driver core
clears the driver data to NULL after device_release or on probe failure.

Signed-off-by: Libo Chen <[e-mail]>
Signed-off-by: David S. Miller <[e-mail]>

drivers/net/ethernet/freescale/fsl_pq_mdio.c

···
 
 	mdiobus_unregister(bus);
 
-	dev_set_drvdata(device, NULL);
-
 	iounmap(priv->map);
 	mdiobus_free(bus);