net: phy: fix setting autoneg_complete in genphy_update_link

The original patch didn't set phydev->autoneg_complete in one exit path.
Fix this.

Fixes: 4950c2ba

 ("net: phy: fix autoneg mismatch case in genphy_read_status")
Reported-by: Simon Horman <horms@verge.net.au>
Tested-by: Simon Horman <horms@verge.net.au>
Signed-off-by: Heiner Kallweit <hkallweit1@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>