r8169: don't check WoL when powering down PHY and interface is down

We can power down the PHY irregardless of WOL settings if interface
is down. So far we would have left the PHY enabled if WOL options
are set and the interface is brought down.

Signed-off-by: Heiner Kallweit <hkallweit1@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>