batman-adv: Prefix icmp-socket 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.c b/net/batman-adv/bat_debugfs.c
index 7b294b4..9177a06 100644
--- a/net/batman-adv/bat_debugfs.c
+++ b/net/batman-adv/bat_debugfs.c
@@ -349,7 +349,7 @@
 	if (!bat_priv->debug_dir)
 		goto out;
 
-	if (bat_socket_setup(bat_priv) < 0)
+	if (batadv_socket_setup(bat_priv) < 0)
 		goto rem_attr;
 
 	if (debug_log_setup(bat_priv) < 0)