vlan: move struct vlan_dev_info to private header

Hide struct vlan_dev_info from drivers to prevent them from growing
more creative ways to use it. Provide accessors for the two drivers
that currently use it.

Signed-off-by: Patrick McHardy <kaber@trash.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/drivers/net/cxgb3/l2t.c b/drivers/net/cxgb3/l2t.c
index f510140..825e510 100644
--- a/drivers/net/cxgb3/l2t.c
+++ b/drivers/net/cxgb3/l2t.c
@@ -337,7 +337,7 @@
 		atomic_set(&e->refcnt, 1);
 		neigh_replace(e, neigh);
 		if (neigh->dev->priv_flags & IFF_802_1Q_VLAN)
-			e->vlan = vlan_dev_info(neigh->dev)->vlan_id;
+			e->vlan = vlan_dev_vlan_id(neigh->dev);
 		else
 			e->vlan = VLAN_NONE;
 		spin_unlock(&e->lock);
diff --git a/drivers/s390/net/qeth_l3_main.c b/drivers/s390/net/qeth_l3_main.c
index 999552c..85be40a 100644
--- a/drivers/s390/net/qeth_l3_main.c
+++ b/drivers/s390/net/qeth_l3_main.c
@@ -2020,7 +2020,7 @@
 		}
 	}
 
-	if (rc && !(netdev_priv(vlan_dev_info(dev)->real_dev) == (void *)card))
+	if (rc && !(netdev_priv(vlan_dev_real_dev(dev)) == (void *)card))
 		return 0;
 
 	return rc;
@@ -2056,7 +2056,7 @@
 	if (rc == QETH_REAL_CARD)
 		card = netdev_priv(dev);
 	else if (rc == QETH_VLAN_CARD)
-		card = netdev_priv(vlan_dev_info(dev)->real_dev);
+		card = netdev_priv(vlan_dev_real_dev(dev));
 	if (card && card->options.layer2)
 		card = NULL;
 	QETH_DBF_TEXT_(TRACE, 4, "%d", rc);