[DCCP]: Adds the tx buffer sysctls

This one got lost on the way from Ian to Gerrit to me, fix it.

Signed-off-by: Ian McDonald <ian.mcdonald@jandi.co.nz>
Signed-off-by: Arnaldo Carvalho de Melo <acme@mandriva.com>
diff --git a/net/dccp/sysctl.c b/net/dccp/sysctl.c
index 8b62061..4775ba3 100644
--- a/net/dccp/sysctl.c
+++ b/net/dccp/sysctl.c
@@ -91,6 +91,15 @@
 		.mode		= 0644,
 		.proc_handler	= proc_dointvec,
 	},
+	{
+		.ctl_name	= NET_DCCP_DEFAULT_TX_QLEN,
+		.procname	= "tx_qlen",
+		.data		= &sysctl_dccp_tx_qlen,
+		.maxlen		= sizeof(sysctl_dccp_tx_qlen),
+		.mode		= 0644,
+		.proc_handler	= proc_dointvec,
+	},
+
 	{ .ctl_name = 0, }
 };