tcp: Trivial fix to correct function name in a comment in net/ipv4/tcp.c

This is a trivial fix to correct function name in a comment in
net/ipv4/tcp.c.

Signed-off-by: Satoru SATOH <satoru.satoh@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/net/ipv4/tcp.c b/net/ipv4/tcp.c
index 58ac838..f886531 100644
--- a/net/ipv4/tcp.c
+++ b/net/ipv4/tcp.c
@@ -1722,7 +1722,7 @@
 
 /*
  *	Shutdown the sending side of a connection. Much like close except
- *	that we don't receive shut down or set_sock_flag(sk, SOCK_DEAD).
+ *	that we don't receive shut down or sock_set_flag(sk, SOCK_DEAD).
  */
 
 void tcp_shutdown(struct sock *sk, int how)