igc: Remove the internal 'eee_advert' field

Since the kernel's 'ethtool_keee' structure is in use, the internal
'eee_advert' field becomes pointless and can be removed.

This patch comes to clean up this redundant code.

Signed-off-by: Sasha Neftin <sasha.neftin@intel.com>
Tested-by: Mor Bar-Gabay <morx.bar.gabay@intel.com> (A Contingent Worker at Intel)
Signed-off-by: Tony Nguyen <anthony.l.nguyen@intel.com>

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

@@ -202,7 +202,6 @@ struct igc_adapter {
 	struct net_device *netdev;
 
 	struct ethtool_keee eee;
-	u16 eee_advert;
 
 	unsigned long state;
 	unsigned int flags;

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

@@ -1636,10 +1636,6 @@ static int igc_ethtool_get_eee(struct net_device *netdev,
 	linkmode_set_bit(ETHTOOL_LINK_MODE_100baseT_Full_BIT,
 			 edata->supported);
 
-	if (hw->dev_spec._base.eee_enable)
-		mii_eee_cap1_mod_linkmode_t(edata->advertised,
-					    adapter->eee_advert);
-
 	eeer = rd32(IGC_EEER);
 
 	/* EEE status on negotiated link */
@@ -1700,8 +1696,6 @@ static int igc_ethtool_set_eee(struct net_device *netdev,
 		return -EINVAL;
 	}
 
-	adapter->eee_advert = linkmode_to_mii_eee_cap1_t(edata->advertised);
-
 	if (hw->dev_spec._base.eee_enable != edata->eee_enabled) {
 		hw->dev_spec._base.eee_enable = edata->eee_enabled;
 		adapter->flags |= IGC_FLAG_EEE;

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

@@ -4975,9 +4975,6 @@ void igc_up(struct igc_adapter *adapter)
 	/* start the watchdog. */
 	hw->mac.get_link_status = true;
 	schedule_work(&adapter->watchdog_task);
-
-	adapter->eee_advert = MDIO_EEE_100TX | MDIO_EEE_1000T |
-			      MDIO_EEE_2_5GT;
 }
 
 /**