net: rename vlan_tx_* helpers since "tx" is misleading there

The same macros are used for rx as well. So rename it.

Signed-off-by: Jiri Pirko <jiri@resnulli.us>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/drivers/vhost/net.c b/drivers/vhost/net.c
index 14419a8..bcaf4ca 100644
--- a/drivers/vhost/net.c
+++ b/drivers/vhost/net.c
@@ -469,7 +469,7 @@
 	head = skb_peek(&sk->sk_receive_queue);
 	if (likely(head)) {
 		len = head->len;
-		if (vlan_tx_tag_present(head))
+		if (skb_vlan_tag_present(head))
 			len += VLAN_HLEN;
 	}