tcp: rename tcp_tso_segment()

Rename tcp_tso_segment() to tcp_gso_segment(), to better reflect
what is going on, and ease grep games.

Signed-off-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/include/net/tcp.h b/include/net/tcp.h
index 1db3a01..372dccc 100644
--- a/include/net/tcp.h
+++ b/include/net/tcp.h
@@ -1548,7 +1548,7 @@
 
 void tcp_v4_destroy_sock(struct sock *sk);
 
-struct sk_buff *tcp_tso_segment(struct sk_buff *skb,
+struct sk_buff *tcp_gso_segment(struct sk_buff *skb,
 				netdev_features_t features);
 struct sk_buff **tcp_gro_receive(struct sk_buff **head, struct sk_buff *skb);
 int tcp_gro_complete(struct sk_buff *skb);