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/main.c b/net/batman-adv/main.c
index 8e40836..84dbda5 100644
--- a/net/batman-adv/main.c
+++ b/net/batman-adv/main.c
@@ -65,7 +65,7 @@
 	if (!bat_event_workqueue)
 		return -ENOMEM;
 
-	bat_socket_init();
+	batadv_socket_init();
 	batadv_debugfs_init();
 
 	register_netdevice_notifier(&batadv_hard_if_notifier);