batman-adv: Prefix bat_debugfs 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 1f064d4..46a35e1 100644
--- a/net/batman-adv/main.c
+++ b/net/batman-adv/main.c
@@ -66,7 +66,7 @@
 		return -ENOMEM;
 
 	bat_socket_init();
-	debugfs_init();
+	batadv_debugfs_init();
 
 	register_netdevice_notifier(&hard_if_notifier);
 
@@ -78,7 +78,7 @@
 
 static void __exit batman_exit(void)
 {
-	debugfs_destroy();
+	batadv_debugfs_destroy();
 	unregister_netdevice_notifier(&hard_if_notifier);
 	hardif_remove_interfaces();