um: Kill directly reference of netdev->priv

Simply replace netdev->priv with netdev_priv().

Signed-off-by: Wang Chen <wangchen@cn.fujitsu.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/arch/um/os-Linux/drivers/tuntap_kern.c b/arch/um/os-Linux/drivers/tuntap_kern.c
index 6b9e33d..4048800 100644
--- a/arch/um/os-Linux/drivers/tuntap_kern.c
+++ b/arch/um/os-Linux/drivers/tuntap_kern.c
@@ -21,7 +21,7 @@
 	struct tuntap_data *tpri;
 	struct tuntap_init *init = data;
 
-	pri = dev->priv;
+	pri = netdev_priv(dev);
 	tpri = (struct tuntap_data *) pri->user;
 	tpri->dev_name = init->dev_name;
 	tpri->fixed_config = (init->dev_name != NULL);