rtnelink: remove unused parameter from rtnl_create_link().

This patch removes an unused parameter (src_net) from rtnl_create_link()
method and from the method single invocation, in veth.
This parameter was used in the past when calling
ops->get_tx_queues(src_net, tb) in rtnl_create_link().
The get_tx_queues() member of rtnl_link_ops was replaced by two methods,
get_num_tx_queues() and get_num_rx_queues(), which do not get any
parameter. This was done in commit d40156aa5ecbd51fed932ed4813df82b56e5ff4d by
Jiri Pirko ("rtnl: allow to specify different num for rx and tx queue count").

Signed-off-by: Rami Rosen <ramirose@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/include/net/rtnetlink.h b/include/net/rtnetlink.h
index 6b00c4f..5a15fab 100644
--- a/include/net/rtnetlink.h
+++ b/include/net/rtnetlink.h
@@ -125,7 +125,7 @@
 
 
 extern struct net *rtnl_link_get_net(struct net *src_net, struct nlattr *tb[]);
-extern struct net_device *rtnl_create_link(struct net *src_net, struct net *net,
+extern struct net_device *rtnl_create_link(struct net *net,
 	char *ifname, const struct rtnl_link_ops *ops, struct nlattr *tb[]);
 extern int rtnl_configure_link(struct net_device *dev,
 			       const struct ifinfomsg *ifm);