gtp: set device type

Set the devtype to 'gtp' when setting up the link.
Signed-off-by: Jonas Bonn <jonas@norrbonn.se>
Acked-by: Harald Welte <laforge@gnumonks.org>
Acked-by: Pravin B Shelar <pshelar@ovn.org>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

drivers/net/gtp.c

@@ -610,6 +610,10 @@ static const struct net_device_ops gtp_netdev_ops = {
 	.ndo_get_stats64	= dev_get_tstats64,
 };
 
+static const struct device_type gtp_type = {
+	.name = "gtp",
+};
+
 static void gtp_link_setup(struct net_device *dev)
 {
 	unsigned int max_gtp_header_len = sizeof(struct iphdr) +
@@ -618,6 +622,7 @@ static void gtp_link_setup(struct net_device *dev)
 
 	dev->netdev_ops		= &gtp_netdev_ops;
 	dev->needs_free_netdev	= true;
+	SET_NETDEV_DEVTYPE(dev, &gtp_type);
 
 	dev->hard_header_len = 0;
 	dev->addr_len = 0;