ixgbe: Do not support flow control autonegotiation for X553

Flow control autonegotiation is not supported for fiber on X553.  Add
device ID checks in ixgbe_device_supports_autoneg_fc() to return the
appropriate value.
Signed-off-by: Tony Nguyen <anthony.l.nguyen@intel.com>
Signed-off-by: Emil Tantilov <emil.s.tantilov@intel.com>
Tested-by: Andrew Bowers <andrewx.bowers@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>

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

@@ -79,6 +79,13 @@ bool ixgbe_device_supports_autoneg_fc(struct ixgbe_hw *hw)
 
 	switch (hw->phy.media_type) {
 	case ixgbe_media_type_fiber:
+		/* flow control autoneg black list */
+		switch (hw->device_id) {
+		case IXGBE_DEV_ID_X550EM_A_SFP:
+		case IXGBE_DEV_ID_X550EM_A_SFP_N:
+			supported = false;
+			break;
+		default:
 			hw->mac.ops.check_link(hw, &speed, &link_up, false);
 			/* if link is down, assume supported */
 			if (link_up)
@@ -86,6 +93,8 @@ bool ixgbe_device_supports_autoneg_fc(struct ixgbe_hw *hw)
 				true : false;
 			else
 				supported = true;
+		}
+
 		break;
 	case ixgbe_media_type_backplane:
 		supported = true;
@@ -111,6 +120,10 @@ bool ixgbe_device_supports_autoneg_fc(struct ixgbe_hw *hw)
 		break;
 	}
 
+	if (!supported)
+		hw_dbg(hw, "Device %x does not support flow control autoneg\n",
+		       hw->device_id);
+
 	return supported;
 }