batman-adv: avoid characters requiring shell escapes in protocol names

Reported-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: Marek Lindner <lindner_marek@yahoo.de>
Signed-off-by: Sven Eckelmann <sven@narfation.org>
diff --git a/net/batman-adv/main.c b/net/batman-adv/main.c
index bd83aa4..65b4f08 100644
--- a/net/batman-adv/main.c
+++ b/net/batman-adv/main.c
@@ -40,7 +40,7 @@
  * list traversals just rcu-locked */
 struct list_head hardif_list;
 static int (*recv_packet_handler[256])(struct sk_buff *, struct hard_iface *);
-char bat_routing_algo[20] = "BATMAN IV";
+char bat_routing_algo[20] = "BATMAN_IV";
 static struct hlist_head bat_algo_list;
 
 unsigned char broadcast_addr[] = {0xff, 0xff, 0xff, 0xff, 0xff, 0xff};