net/mlx4_en: fix WOL handlers were always looking at port2 capability bit

There are 2 capability bits for WOL, one for each port.
WOL handlers were looking only on the second bit, regardless of the port.

Signed-off-by: Oren Duer <oren@mellanox.co.il>
Signed-off-by: David S. Miller <davem@davemloft.net>