Driver Core: misc: add nodename support for misc devices.

This adds support for misc devices to report their requested nodename to
userspace.  It also updates a number of misc drivers to provide the
needed subdirectory and device name to be used for them.

Signed-off-by: Kay Sievers <kay.sievers@vrfy.org>
Signed-off-by: Jan Blunck <jblunck@suse.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

diff --git a/drivers/net/tun.c b/drivers/net/tun.c
index 811d351..11a0ba4 100644
--- a/drivers/net/tun.c
+++ b/drivers/net/tun.c
@@ -1366,6 +1366,7 @@
 static struct miscdevice tun_miscdev = {
 	.minor = TUN_MINOR,
 	.name = "tun",
+	.devnode = "net/tun",
 	.fops = &tun_fops,
 };