class: rename "interfaces" to "class_interfaces" in internal class structure

This renames the struct class "interfaces" field to be
"class_interfaces" to make things easier when struct bus_type and struct
class merge in the future.  It also makes grepping for fields easier as
well.

Based on an idea from Kay.

Cc: Kay Sievers <kay.sievers@vrfy.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
diff --git a/drivers/base/base.h b/drivers/base/base.h
index 586c4ca..670b95a 100644
--- a/drivers/base/base.h
+++ b/drivers/base/base.h
@@ -43,7 +43,7 @@
  * @subsys - the struct kset that defines this class.  This is the main kobject
  * @children - list of class_devices associated with this class
  * @class_devices - list of devices associated with this class
- * @interfaces - list of class_interfaces associated with this class
+ * @class_interfaces - list of class_interfaces associated with this class
  * @class_dirs -
  * @sem - semaphore to protect the children, devices, and interfaces lists.
  * @class - pointer back to the struct class that this structure is associated
@@ -56,7 +56,7 @@
 struct class_private {
 	struct kset subsys;
 	struct list_head class_devices;
-	struct list_head interfaces;
+	struct list_head class_interfaces;
 	struct kset class_dirs;
 	struct semaphore sem;
 	struct class *class;