bnx2x: Fix port type display

    Display the current media type connected to the port in ethtool.

    Signed-off-by: Yaniv Rosner <yanivr@broadcom.com>
    Signed-off-by: Eilon Greenstein <eilong@broadcom.com>
    Signed-off-by: David S. Miller <davem@davemloft.net>