gianfar: Check if phydev present on ethtool -A
This fixes a seg fault on 'ethtool -A' entry if the interface is down. Obviously we need to have the phy device initialized / "connected" (see of_phy_connect()) to be able to advertise pause frame capabilities. Fixes: 23402bddSigned-off-by: Claudiu Manoil <claudiu.manoil@freescale.com> Signed-off-by: David S. Miller <davem@davemloft.net>
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