[IPV6] ROUTE: Add credits about subtree fixes.

Based on MIPL2 kernel patch.

Signed-off-by: YOSHIFUJI Hideaki <yoshfuji@linux-ipv6.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/net/ipv6/route.c b/net/ipv6/route.c
index fd626d4..fd6f2ec 100644
--- a/net/ipv6/route.c
+++ b/net/ipv6/route.c
@@ -22,6 +22,8 @@
  *		routers in REACHABLE, STALE, DELAY or PROBE states).
  *		- always select the same router if it is (probably)
  *		reachable.  otherwise, round-robin the list.
+ *	Ville Nuorvala
+ *		Fixed routing subtrees.
  */
 
 #include <linux/capability.h>