vlan: set sysfs device_type to 'vlan'

Sets the sysfs device_type to 'vlan' for udev. This makes it easier for
applications that query network information via udev to identify vlans
instead of using strrchr().
Signed-off-by: NDoug Goldstein <cardoe@cardoe.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

net/8021q/vlan_dev.c

@@ -531,6 +531,10 @@ static const struct header_ops vlan_header_ops = {
 	.parse	 = eth_header_parse,
 };
 
+static struct device_type vlan_type = {
+	.name	= "vlan",
+};
+
 static const struct net_device_ops vlan_netdev_ops;
 
 static int vlan_dev_init(struct net_device *dev)
@@ -579,6 +583,8 @@ static int vlan_dev_init(struct net_device *dev)
 
 	dev->netdev_ops = &vlan_netdev_ops;
 
+	SET_NETDEV_DEVTYPE(dev, &vlan_type);
+
 	if (is_vlan_dev(real_dev))
 		subclass = 1;