ixgbe: Add ethtool support to enable 2.5 and 5.0 Gbps support

Added full support for new version Ethtool API. New API allow use
2500Gbase-T and 5000base-T supported and advertised link speed modes.
Signed-off-by: Radoslaw Tyl <radoslawx.tyl@intel.com>
Tested-by: Andrew Bowers <andrewx.bowers@intel.com>
Signed-off-by: Tony Nguyen <anthony.l.nguyen@intel.com>

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

@@ -5501,9 +5501,13 @@ static int ixgbe_non_sfp_link_config(struct ixgbe_hw *hw)
 		return ret;
 
 	speed = hw->phy.autoneg_advertised;
-	if ((!speed) && (hw->mac.ops.get_link_capabilities))
+	if (!speed && hw->mac.ops.get_link_capabilities) {
 		ret = hw->mac.ops.get_link_capabilities(hw, &speed,
 							&autoneg);
+		speed &= ~(IXGBE_LINK_SPEED_5GB_FULL |
+			   IXGBE_LINK_SPEED_2_5GB_FULL);
+	}
+
 	if (ret)
 		return ret;