ixgbe: add WOL support for SFP+ subdevice

This patch will add wake on LAN support to the dev/sub_dev 10FB 11A9.  This
will also include ixgbe ethtool support for this device.

Signed-off-by: Don Skidmore <donald.c.skidmore@intel.com>
Tested-by: Stephen Ko <stephen.s.ko@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/drivers/net/ixgbe/ixgbe_ethtool.c b/drivers/net/ixgbe/ixgbe_ethtool.c
index f9b5839..ef3f910 100644
--- a/drivers/net/ixgbe/ixgbe_ethtool.c
+++ b/drivers/net/ixgbe/ixgbe_ethtool.c
@@ -1879,7 +1879,16 @@
 	struct ixgbe_hw *hw = &adapter->hw;
 	int retval = 1;
 
+	/* WOL not supported except for the following */
 	switch(hw->device_id) {
+	case IXGBE_DEV_ID_82599_SFP:
+		/* Only this subdevice supports WOL */
+		if (hw->subsystem_device_id != IXGBE_SUBDEV_ID_82599_SFP) {
+			wol->supported = 0;
+			break;
+		}
+		retval = 0;
+		break;
 	case IXGBE_DEV_ID_82599_COMBO_BACKPLANE:
 		/* All except this subdevice support WOL */
 		if (hw->subsystem_device_id ==
@@ -1887,6 +1896,8 @@
 			wol->supported = 0;
 			break;
 		}
+		retval = 0;
+		break;
 	case IXGBE_DEV_ID_82599_KX4:
 		retval = 0;
 		break;