MFC r257307:   Fix regression introduced in r235816.   r235816 triggered kernel panic or hang after warm boot.   Don't blindly restore BCE_EMAC_MODE media configuration in   bce_reset().  If driver is about to shutdown it will invoke   bce_reset() which in turn results in restoring BCE_EMAC_MODE   media configuration.  This operation seems to confuse controller   firmware. Approved by:	re (glebius)
MFC r257307:
  Fix regression introduced in r235816.
  r235816 triggered kernel panic or hang after warm boot.
  Don't blindly restore BCE_EMAC_MODE media configuration in
  bce_reset().  If driver is about to shutdown it will invoke
  bce_reset() which in turn results in restoring BCE_EMAC_MODE
  media configuration.  This operation seems to confuse controller
  firmware.
Approved by:	re (glebius)

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