batman-adv: Prefix vis 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/routing.c b/net/batman-adv/routing.c
index 4103f68..d492634 100644
--- a/net/batman-adv/routing.c
+++ b/net/batman-adv/routing.c
@@ -1151,13 +1151,13 @@
 
 	switch (vis_packet->vis_type) {
 	case VIS_TYPE_SERVER_SYNC:
-		receive_server_sync_packet(bat_priv, vis_packet,
-					   skb_headlen(skb));
+		batadv_receive_server_sync_packet(bat_priv, vis_packet,
+						  skb_headlen(skb));
 		break;
 
 	case VIS_TYPE_CLIENT_UPDATE:
-		receive_client_update_packet(bat_priv, vis_packet,
-					     skb_headlen(skb));
+		batadv_receive_client_update_packet(bat_priv, vis_packet,
+						    skb_headlen(skb));
 		break;
 
 	default:	/* ignore unknown packet */