net: emac: 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: NLibo Chen <libo.chen@huawei.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

drivers/net/ethernet/ibm/emac/core.c

@@ -2955,8 +2955,6 @@ static int emac_remove(struct platform_device *ofdev)
 
 	DBG(dev, "remove" NL);
 
-	dev_set_drvdata(&ofdev->dev, NULL);
-
 	unregister_netdev(dev->ndev);
 
 	cancel_work_sync(&dev->reset_work);