Move the creation of the sysfs "dev" file of a class device into the
driver core. The struct class_device contains a dev_t value now.  If set,
the driver core will create the "dev" file containing the major/minor
numbers automatically.
Signed-off-by: Kay Sievers <kay.sievers@vrfy.org>
Signed-off-by: Greg Kroah-Hartman <greg@kroah.com>