net/mlx4_core: Use both physical ports to dispatch link state events to VF

Under HA mode, the link down event should be sent to VFs only if both
ports are down.

Signed-off-by: Moni Shoua <monis@mellanox.com>
Reviewed-by: Jack Morgenstein <jackm@dev.mellanox.co.il>
Signed-off-by: Or Gerlitz <ogerlitz@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>