tcp: add mss_clamp to tcp_request_sock_ops

Add mss_clamp member to tcp_request_sock_ops so that we can later
unify tcp_v4_conn_request and tcp_v6_conn_request.

Signed-off-by: Octavian Purdila <octavian.purdila@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/include/net/tcp.h b/include/net/tcp.h
index 8e9c28d..30fe98b 100644
--- a/include/net/tcp.h
+++ b/include/net/tcp.h
@@ -1592,6 +1592,7 @@
 };
 
 struct tcp_request_sock_ops {
+	u16 mss_clamp;
 #ifdef CONFIG_TCP_MD5SIG
 	struct tcp_md5sig_key	*(*md5_lookup) (struct sock *sk,
 						struct request_sock *req);