batman-adv: Prefix bridge_loop_avoidance 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/main.c b/net/batman-adv/main.c
index 46a35e1..3e1bb7a 100644
--- a/net/batman-adv/main.c
+++ b/net/batman-adv/main.c
@@ -125,7 +125,7 @@
 	if (ret < 0)
 		goto err;
 
-	ret = bla_init(bat_priv);
+	ret = batadv_bla_init(bat_priv);
 	if (ret < 0)
 		goto err;
 
@@ -154,7 +154,7 @@
 
 	tt_free(bat_priv);
 
-	bla_free(bat_priv);
+	batadv_bla_free(bat_priv);
 
 	free_percpu(bat_priv->bat_counters);