[TCP]: clear_all_retrans_hints prefixed by tcp_

In addition, fix its function comment spacing.

Signed-off-by: Ilpo Järvinen <ilpo.jarvinen@helsinki.fi>
diff --git a/net/ipv4/tcp_output.c b/net/ipv4/tcp_output.c
index cbe8bf6..f46d24b 100644
--- a/net/ipv4/tcp_output.c
+++ b/net/ipv4/tcp_output.c
@@ -687,7 +687,7 @@
 
 	BUG_ON(len > skb->len);
 
-	clear_all_retrans_hints(tp);
+	tcp_clear_all_retrans_hints(tp);
 	nsize = skb_headlen(skb) - len;
 	if (nsize < 0)
 		nsize = 0;
@@ -1719,7 +1719,7 @@
 		       tcp_skb_pcount(next_skb) != 1);
 
 		/* changing transmit queue under us so clear hints */
-		clear_all_retrans_hints(tp);
+		tcp_clear_all_retrans_hints(tp);
 
 		/* Ok.	We will be able to collapse the packet. */
 		tcp_unlink_write_queue(next_skb, sk);
@@ -1792,7 +1792,7 @@
 		}
 	}
 
-	clear_all_retrans_hints(tp);
+	tcp_clear_all_retrans_hints(tp);
 
 	if (!lost)
 		return;