net: ethernet: cpmac: Call SET_NETDEV_DEV()

The TI CPMAC driver calls into PHYLIB which now checks for
net_device->dev.parent, so make sure we do set it before calling into
any MDIO/PHYLIB related function.

Fixes: ec988ad78ed6 ("phy: Don't increment MDIO bus refcount unless it's a different owner")
Signed-off-by: Florian Fainelli <[e-mail]>
Signed-off-by: David S. Miller <[e-mail]>

drivers/net/ethernet/ti/cpmac.c

···
 	if (!dev)
 		return -ENOMEM;
 
+	SET_NETDEV_DEV(dev, &pdev->dev);
 	platform_set_drvdata(pdev, dev);
 	priv = netdev_priv(dev);