ixgbe: Add SFP+ detection for X550 hardware

This patch is part of the future enablement of X550 SFP+ support.  This
HW uses different SDP so the interrupts need to be set up accordingly.
Signed-off-by: NDonald C Skidmore <donald.c.skidmore@intel.com>
Signed-off-by: NJeff Kirsher <jeffrey.t.kirsher@intel.com>

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

@@ -4904,9 +4904,15 @@ static void ixgbe_setup_gpie(struct ixgbe_adapter *adapter)
 	if (adapter->flags & IXGBE_FLAG_FAN_FAIL_CAPABLE)
 		gpie |= IXGBE_SDP1_GPIEN(hw);
 
-	if (hw->mac.type == ixgbe_mac_82599EB) {
-		gpie |= IXGBE_SDP1_GPIEN_8259X;
-		gpie |= IXGBE_SDP2_GPIEN_8259X;
+	switch (hw->mac.type) {
+	case ixgbe_mac_82599EB:
+		gpie |= IXGBE_SDP1_GPIEN_8259X | IXGBE_SDP2_GPIEN_8259X;
+		break;
+	case ixgbe_mac_X550EM_x:
+		gpie |= IXGBE_SDP0_GPIEN_X540;
+		break;
+	default:
+		break;
 	}
 
 	IXGBE_WRITE_REG(hw, IXGBE_GPIE, gpie);