IB/mlx4: Remove unused variable from function declaration

Remove unused netw_view parameter from eth_link_query_port() function.

Reported-by: Shiraz Saleem <shiraz.saleem@intel.com>
Signed-off-by: Leon Romanovsky <leonro@mellanox.com>
Signed-off-by: Doug Ledford <dledford@redhat.com>