net/mlx4: Remove unused macro

The macro mlx4_foreach_non_ib_transport_port() is not used anywhere. Remove it.

Fixes: aa9a2d51 ("mlx4: Activate RoCE/SRIOV")
Signed-off-by: Moni Shoua <monis@mellanox.com>
Signed-off-by: Doug Ledford <dledford@redhat.com>