tipc: Add network address mask helper routines

Introduces a pair of helper routines that convert the network address
for a TIPC node into the network address for its cluster or zone.

This is a cosmetic change designed to avoid future errors caused by
the incorrect use of address bitmasks, and does not alter the existing
operation of TIPC.

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 d040d47..14f98c8 100644
--- a/net/tipc/node.c
+++ b/net/tipc/node.c
@@ -470,7 +470,7 @@
 
 	/* Add TLV for broadcast link */
 
-	link_info.dest = htonl(tipc_own_addr & 0xfffff000);
+	link_info.dest = htonl(tipc_cluster_mask(tipc_own_addr));
 	link_info.up = htonl(1);
 	strlcpy(link_info.str, tipc_bclink_name, TIPC_MAX_LINK_NAME);
 	tipc_cfg_append_tlv(buf, TIPC_TLV_LINK_INFO, &link_info, sizeof(link_info));