Revert "[PATCH] USB: convert usb class devices to real devices"

This reverts bd00949647ddcea47ce4ea8bb2cfcfc98ebf9f2a commit because it
required a newer version of udev to work properly than what is currently
documented in Documentation/Changes.

Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
diff --git a/include/linux/usb.h b/include/linux/usb.h
index c944e8f..398c52f 100644
--- a/include/linux/usb.h
+++ b/include/linux/usb.h
@@ -103,8 +103,7 @@
  * @condition: binding state of the interface: not bound, binding
  *	(in probe()), bound to a driver, or unbinding (in disconnect())
  * @dev: driver model's view of this device
- * @usb_dev: if an interface is bound to the USB major, this will point
- *	to the sysfs representation for that device.
+ * @class_dev: driver model's class view of this device.
  *
  * USB device drivers attach to interfaces on a physical device.  Each
  * interface encapsulates a single high level function, such as feeding
@@ -144,7 +143,7 @@
 					 * bound to */
 	enum usb_interface_condition condition;		/* state of binding */
 	struct device dev;		/* interface specific device info */
-	struct device *usb_dev;		/* pointer to the usb class's device, if any */
+	struct class_device *class_dev;
 };
 #define	to_usb_interface(d) container_of(d, struct usb_interface, dev)
 #define	interface_to_usbdev(intf) \