bnx2x: fix set_setting for some PHYs

Allow set_settings() to complete succesfully even if link is
not estabilished and port type isn't known yet.

Signed-off-by: Yaniv Rosner <Yaniv.Rosner@qlogic.com>
Signed-off-by: Dmitry Kravkov <Dmitry.Kravkov@qlogic.com>
Signed-off-by: David S. Miller <davem@davemloft.net>