tipc: Minor optimization to broadcast link synchronization logic

Optimizes processing done when contact with a neighboring node is
established to avoid recording the current state of outgoing broadcast
messages if the neighboring node isn't a valid broadcast link destination,
since this state information isn't needed for such nodes.

Signed-off-by: Allan Stephens <allan.stephens@windriver.com>
Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com>
diff --git a/net/tipc/node.c b/net/tipc/node.c
index d7f8b7b..12ddc65 100644
--- a/net/tipc/node.c
+++ b/net/tipc/node.c
@@ -270,10 +270,8 @@
 {
 	tipc_k_signal((Handler)tipc_named_node_up, n_ptr->addr);
 
-	/* Syncronize broadcast acks */
-	n_ptr->bclink.acked = tipc_bclink_get_last_sent();
-
 	if (n_ptr->bclink.supportable) {
+		n_ptr->bclink.acked = tipc_bclink_get_last_sent();
 		tipc_bclink_add_node(n_ptr->addr);
 		n_ptr->bclink.supported = 1;
 	}