net: Convert hashlimit_net_ops and recent_net_ops

These pernet_operations just create and destroy /proc entries.
Also, new /proc entries also may come after new nf rules
are added, but this is not possible, when net isn't alive.
So, they are safe to be marked as async.
Signed-off-by: Kirill Tkhai <ktkhai@virtuozzo.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

net/netfilter/xt_hashlimit.c

@@ -1345,6 +1345,7 @@ static struct pernet_operations hashlimit_net_ops = {
 	.exit	= hashlimit_net_exit,
 	.id	= &hashlimit_net_id,
 	.size	= sizeof(struct hashlimit_net),
+	.async	= true,
 };
 
 static int __init hashlimit_mt_init(void)

net/netfilter/xt_recent.c

@@ -687,6 +687,7 @@ static struct pernet_operations recent_net_ops = {
 	.exit	= recent_net_exit,
 	.id	= &recent_net_id,
 	.size	= sizeof(struct recent_net),
+	.async	= true,
 };
 
 static struct xt_match recent_mt_reg[] __read_mostly = {