igb: update ethtool stats to support multiqueue

Addesses problems seen earlier with igb driver not correctly reporting rx
and tx stats.

Signed-off-by: Alexander Duyck <alexander.h.duyck@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
diff --git a/drivers/net/igb/igb.h b/drivers/net/igb/igb.h
index a1431c8..5915efc 100644
--- a/drivers/net/igb/igb.h
+++ b/drivers/net/igb/igb.h
@@ -158,6 +158,7 @@
 	union {
 		/* TX */
 		struct {
+			struct igb_queue_stats tx_stats;
 			bool detect_tx_hung;
 		};
 		/* RX */