igc: Remove reset disable flag

Boolean reset disable flag not applicable for i225 device and
could be removed.
Signed-off-by: Sasha Neftin <sasha.neftin@intel.com>
Tested-by: Aaron Brown <aaron.f.brown@intel.com>
Signed-off-by: Tony Nguyen <anthony.l.nguyen@intel.com>

drivers/net/ethernet/intel/igc/igc_hw.h

@@ -158,7 +158,6 @@ struct igc_phy_info {
 	u8 mdix;
 
 	bool is_mdix;
-	bool reset_disable;
 	bool speed_downgraded;
 	bool autoneg_wait_to_complete;
 };