ixgbe: do not report 2.5 Gbps as supported

Some X550 devices can connect at 2.5Gbps during fail-over, but only
with certain link partners. Also setting the advertised speed will
not work so we do not report it as supported to avoid confusion.
Signed-off-by: Emil Tantilov <emil.s.tantilov@intel.com>
Tested-by: Phil Schmitt <phillip.j.schmitt@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>

drivers/net/ethernet/intel/ixgbe/ixgbe_ethtool.c

@@ -166,8 +166,6 @@ static int ixgbe_get_settings(struct net_device *netdev,
 	/* set the supported link speeds */
 	if (supported_link & IXGBE_LINK_SPEED_10GB_FULL)
 		ecmd->supported |= SUPPORTED_10000baseT_Full;
-	if (supported_link & IXGBE_LINK_SPEED_2_5GB_FULL)
-		ecmd->supported |= SUPPORTED_2500baseX_Full;
 	if (supported_link & IXGBE_LINK_SPEED_1GB_FULL)
 		ecmd->supported |= SUPPORTED_1000baseT_Full;
 	if (supported_link & IXGBE_LINK_SPEED_100_FULL)
@@ -179,8 +177,6 @@ static int ixgbe_get_settings(struct net_device *netdev,
 			ecmd->advertising |= ADVERTISED_100baseT_Full;
 		if (hw->phy.autoneg_advertised & IXGBE_LINK_SPEED_10GB_FULL)
 			ecmd->advertising |= ADVERTISED_10000baseT_Full;
-		if (hw->phy.autoneg_advertised & IXGBE_LINK_SPEED_2_5GB_FULL)
-			ecmd->advertising |= ADVERTISED_2500baseX_Full;
 		if (hw->phy.autoneg_advertised & IXGBE_LINK_SPEED_1GB_FULL)
 			ecmd->advertising |= ADVERTISED_1000baseT_Full;
 	} else {