ipv6 netevent: Remove old_neigh from netevent_redirect.

The only user is cxgb3 driver.

old_neigh is used to check device change, but it must not happen
on redirect.  In this sense, we can remove old_neigh argument.

Signed-off-by: YOSHIFUJI Hideaki <yoshfuji@linux-ipv6.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/include/net/netevent.h b/include/net/netevent.h
index 3ce4988..fe630dd 100644
--- a/include/net/netevent.h
+++ b/include/net/netevent.h
@@ -16,9 +16,8 @@
 
 struct netevent_redirect {
 	struct dst_entry *old;
-	struct neighbour *old_neigh;
 	struct dst_entry *new;
-	struct neighbour *new_neigh;
+	struct neighbour *neigh;
 	const void *daddr;
 };