driver core: export device_rename

In wireless we'd like to allow renaming of the phy devices we surface in
sysfs. The base wireless code, however, can be built modular and thus we
need device_rename exported.
Signed-off-by: Johannes Berg <johannes@sipsolutions.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

drivers/base/core.c

@@ -1065,7 +1065,7 @@ int device_rename(struct device *dev, char *new_name)
 
 	return error;
 }
-
+EXPORT_SYMBOL_GPL(device_rename);
 
 static int device_move_class_links(struct device *dev,
 				   struct device *old_parent,