This sets up the linkage from the phydev back to the ethernet device. This
symptom of not doing this which I noticed was:
    <NULL> Waiting for PHY auto negotiation to complete....
rather than:
    dwmac.
1c50000 Waiting for PHY auto negotiation to complete....
Signed-off-by: Ian Campbell <ijc@hellion.org.uk>
Cc: Alexey Brodkin <Alexey.Brodkin@synopsys.com>
        if (!phydev)
                return -1;
 
+       phy_connect_dev(phydev, dev);
+
        phydev->supported &= PHY_GBIT_FEATURES;
        phydev->advertising = phydev->supported;