openvswitch: Enable tunnel GSO for OVS bridge.

Following patch enables all available tunnel GSO features for OVS
bridge device so that ovs can use hardware offloads available to
underling device.

Signed-off-by: Pravin B Shelar <pshelar@nicira.com>
Acked-by: Andy Zhou <azhou@nicira.com>
diff --git a/include/linux/netdev_features.h b/include/linux/netdev_features.h
index d99800c..dcfdecb 100644
--- a/include/linux/netdev_features.h
+++ b/include/linux/netdev_features.h
@@ -176,4 +176,12 @@
 				 NETIF_F_HW_VLAN_STAG_RX | \
 				 NETIF_F_HW_VLAN_STAG_TX)
 
+#define NETIF_F_GSO_ENCAP_ALL	(NETIF_F_GSO_GRE |			\
+				 NETIF_F_GSO_GRE_CSUM |			\
+				 NETIF_F_GSO_IPIP |			\
+				 NETIF_F_GSO_SIT |			\
+				 NETIF_F_GSO_UDP_TUNNEL |		\
+				 NETIF_F_GSO_UDP_TUNNEL_CSUM |		\
+				 NETIF_F_GSO_MPLS)
+
 #endif	/* _LINUX_NETDEV_FEATURES_H */