rtnetlink & bonding: change args got get_tx_queues

Change get_tx_queues, drop unsused arg/return value real_tx_queues,
and use return by value (with error) rather than call by reference.

Probably bonding should just change to LLTX and the whole get_tx_queues
API could disappear!

Signed-off-by: Stephen Hemminger <shemminger@vyatta.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/include/net/rtnetlink.h b/include/net/rtnetlink.h
index 3702939..5824373 100644
--- a/include/net/rtnetlink.h
+++ b/include/net/rtnetlink.h
@@ -75,9 +75,8 @@
 	size_t			(*get_xstats_size)(const struct net_device *dev);
 	int			(*fill_xstats)(struct sk_buff *skb,
 					       const struct net_device *dev);
-	int			(*get_tx_queues)(struct net *net, struct nlattr *tb[],
-						 unsigned int *tx_queues,
-						 unsigned int *real_tx_queues);
+	int			(*get_tx_queues)(struct net *net,
+						 const struct nlattr *tb[]);
 };
 
 extern int	__rtnl_link_register(struct rtnl_link_ops *ops);