igc: Remove copper fiber switch control

i225 device support copper mode only
PHY signal detect indication for copper fiber switch
not applicable to i225 part
Signed-off-by: Sasha Neftin <sasha.neftin@intel.com>
Tested-by: Aaron Brown <aaron.f.brown@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>

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

@@ -91,8 +91,6 @@
 #define IGC_CTRL_RFCE		0x08000000  /* Receive Flow Control enable */
 #define IGC_CTRL_TFCE		0x10000000  /* Transmit flow control enable */
 
-#define IGC_CONNSW_AUTOSENSE_EN	0x1
-
 /* As per the EAS the maximum supported size is 9.5KB (9728 bytes) */
 #define MAX_JUMBO_FRAME_SIZE	0x2600
 

drivers/net/ethernet/intel/igc/igc_main.c

@@ -4033,7 +4033,6 @@ static void igc_watchdog_task(struct work_struct *work)
 	struct igc_hw *hw = &adapter->hw;
 	struct igc_phy_info *phy = &hw->phy;
 	u16 phy_data, retry_count = 20;
-	u32 connsw;
 	u32 link;
 	int i;
 
@@ -4046,14 +4045,6 @@ static void igc_watchdog_task(struct work_struct *work)
 			link = false;
 	}
 
-	/* Force link down if we have fiber to swap to */
-	if (adapter->flags & IGC_FLAG_MAS_ENABLE) {
-		if (hw->phy.media_type == igc_media_type_copper) {
-			connsw = rd32(IGC_CONNSW);
-			if (!(connsw & IGC_CONNSW_AUTOSENSE_EN))
-				link = 0;
-		}
-	}
 	if (link) {
 		/* Cancel scheduled suspend requests. */
 		pm_runtime_resume(netdev->dev.parent);