bnxt_en: Remove unnecessary call to update PHY settings.

Fix bnxt_update_phy_setting() to check the correct parameters when
determining whether to update the PHY.  Requested line speed/duplex should
only be checked for forced speed mode.  This avoids unnecessary link
interruptions when loading the driver.

Signed-off-by: Michael Chan <michael.chan@broadcom.com>
Signed-off-by: David S. Miller <davem@davemloft.net>