net: Convert tipc_net_ops

TIPC looks concentrated in itself, and other pernet_operations
seem not touching its entities.

tipc_net_ops look pernet-divided, and they should be safe to
be executed in parallel for several net the same time.

Signed-off-by: Kirill Tkhai <ktkhai@virtuozzo.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/net/tipc/core.c b/net/tipc/core.c
index 0b982d0..04fd91b 100644
--- a/net/tipc/core.c
+++ b/net/tipc/core.c
@@ -105,6 +105,7 @@
 	.exit = tipc_exit_net,
 	.id   = &tipc_net_id,
 	.size = sizeof(struct tipc_net),
+	.async = true,
 };
 
 static int __init tipc_init(void)