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/bat_debugfs.h b/net/batman-adv/bat_debugfs.h
index d605c67..3b206c8 100644
--- a/net/batman-adv/bat_debugfs.h
+++ b/net/batman-adv/bat_debugfs.h
@@ -25,9 +25,9 @@
 
 #define DEBUGFS_BAT_SUBDIR "batman_adv"
 
-void debugfs_init(void);
-void debugfs_destroy(void);
-int debugfs_add_meshif(struct net_device *dev);
-void debugfs_del_meshif(struct net_device *dev);
+void batadv_debugfs_init(void);
+void batadv_debugfs_destroy(void);
+int batadv_debugfs_add_meshif(struct net_device *dev);
+void batadv_debugfs_del_meshif(struct net_device *dev);
 
 #endif /* _NET_BATMAN_ADV_DEBUGFS_H_ */