tipc: move bcast_addr from struct tipc_media to struct tipc_bearer

Some network protocols, like InfiniBand, don't have a fixed broadcast
address but one that depends on the configuration. Move the bcast_addr
to struct tipc_bearer and initialize it with the broadcast address of
the network device when the bearer is enabled.

Signed-off-by: Patrick McHardy <kaber@trash.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/net/tipc/bcast.c b/net/tipc/bcast.c
index 2655c9f..25e159c 100644
--- a/net/tipc/bcast.c
+++ b/net/tipc/bcast.c
@@ -620,10 +620,10 @@
 			continue;	/* bearer pair doesn't add anything */
 
 		if (!tipc_bearer_blocked(p))
-			tipc_bearer_send(p, buf, &p->media->bcast_addr);
+			tipc_bearer_send(p, buf, &p->bcast_addr);
 		else if (s && !tipc_bearer_blocked(s))
 			/* unable to send on primary bearer */
-			tipc_bearer_send(s, buf, &s->media->bcast_addr);
+			tipc_bearer_send(s, buf, &s->bcast_addr);
 		else
 			/* unable to send on either bearer */
 			continue;