NETIF_F_VLAN_FEATURES
netdev->vlan_features |= netdev->features & ~NETIF_F_VLAN_FEATURES;
!(priv->dev->features & NETIF_F_VLAN_FEATURES))
if (!(priv->dev->features & NETIF_F_VLAN_FEATURES))
netdev->features |= NETIF_F_IPV6_CSUM | NETIF_F_VLAN_FEATURES;
netdev->features |= NETIF_F_VLAN_FEATURES;
if (dev->features & NETIF_F_VLAN_FEATURES)