batman-adv: Prefix routing non-static functions with batadv_

batman-adv can be compiled as part of the kernel instead of an module. In that
case the linker will see all non-static symbols of batman-adv and all other
non-static symbols of the kernel. This could lead to symbol collisions. A
prefix for the batman-adv symbols that defines their private namespace avoids
such a problem.

Reported-by: David Miller <davem@davemloft.net>
Signed-off-by: Sven Eckelmann <sven@narfation.org>
diff --git a/net/batman-adv/unicast.c b/net/batman-adv/unicast.c
index 6117100..894c6a4 100644
--- a/net/batman-adv/unicast.c
+++ b/net/batman-adv/unicast.c
@@ -310,8 +310,7 @@
 	 *  - if orig_node is NULL it returns NULL
 	 *  - increases neigh_nodes refcount if found.
 	 */
-	neigh_node = find_router(bat_priv, orig_node, NULL);
-
+	neigh_node = batadv_find_router(bat_priv, orig_node, NULL);
 	if (!neigh_node)
 		goto out;