batman-adv: protect bonding with rcu locks

bonding / alternating candidates need to be secured by rcu locks
as well. This patch therefore converts the bonding list
from a plain pointer list to a rcu securable lists and references
the bonding candidates.

Signed-off-by: Simon Wunderlich <siwu@hrz.tu-chemnitz.de>
Signed-off-by: Marek Lindner <lindner_marek@yahoo.de>
diff --git a/net/batman-adv/hard-interface.c b/net/batman-adv/hard-interface.c
index f2131f4..e2b001a 100644
--- a/net/batman-adv/hard-interface.c
+++ b/net/batman-adv/hard-interface.c
@@ -271,7 +271,7 @@
 static void hardif_deactivate_interface(struct batman_if *batman_if)
 {
 	if ((batman_if->if_status != IF_ACTIVE) &&
-	   (batman_if->if_status != IF_TO_BE_ACTIVATED))
+	    (batman_if->if_status != IF_TO_BE_ACTIVATED))
 		return;
 
 	batman_if->if_status = IF_INACTIVE;