mlx4: Sensing link type at device initialization

When bringing the port up, performing a SENSE_PORT command
To try and check to which physical link type (IB or Ethernet) the physical
port is connected.
In case there is no valid link partner, the port will come up as its
supported default.

Signed-off-by: Yevgeny Petrilin <yevgenyp@mellanox.co.il>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/drivers/net/mlx4/mlx4.h b/drivers/net/mlx4/mlx4.h
index c1e0e5f..dd7d745 100644
--- a/drivers/net/mlx4/mlx4.h
+++ b/drivers/net/mlx4/mlx4.h
@@ -431,6 +431,8 @@
 
 void mlx4_handle_catas_err(struct mlx4_dev *dev);
 
+int mlx4_SENSE_PORT(struct mlx4_dev *dev, int port,
+		    enum mlx4_port_type *type);
 void mlx4_do_sense_ports(struct mlx4_dev *dev,
 			 enum mlx4_port_type *stype,
 			 enum mlx4_port_type *defaults);