batman-adv: iv_ogm_orig_update, style, add missing brackets

CodingStyle describes that either none or both branches of a conditional
have to have brackets.
Signed-off-by: NMarkus Pargmann <mpa@pengutronix.de>
Signed-off-by: NMarek Lindner <mareklindner@neomailbox.ch>

net/batman-adv/bat_iv_ogm.c

@@ -1032,9 +1032,10 @@ batadv_iv_ogm_orig_update(struct batadv_priv *bat_priv,
 		batadv_orig_node_free_ref(orig_tmp);
 		if (!neigh_node)
 			goto unlock;
-	} else
+	} else {
 		batadv_dbg(BATADV_DBG_BATMAN, bat_priv,
 			   "Updating existing last-hop neighbor of originator\n");
+	}
 
 	rcu_read_unlock();
 	neigh_ifinfo = batadv_neigh_ifinfo_new(neigh_node, if_outgoing);