neigh: Add device constructor/destructor capability.

If the neigh entry has device private state, it will need
constructor/destructor ops.

Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/include/linux/netdevice.h b/include/linux/netdevice.h
index 5462c2c..1c4ddb3 100644
--- a/include/linux/netdevice.h
+++ b/include/linux/netdevice.h
@@ -974,6 +974,8 @@
 						    netdev_features_t features);
 	int			(*ndo_set_features)(struct net_device *dev,
 						    netdev_features_t features);
+	int			(*ndo_neigh_construct)(struct neighbour *n);
+	int			(*ndo_neigh_destroy)(struct neighbour *n);
 };
 
 /*