Input: USB devices - switch to using input_dev->dev.parent

In preparation for struct class_device -> struct device input
core conversion, switch to using input_dev->dev.parent when
specifying device position in sysfs tree.

Signed-off-by: Dmitry Torokhov <dtor@mail.ru>
diff --git a/drivers/usb/input/powermate.c b/drivers/usb/input/powermate.c
index f951a44..4f93a76 100644
--- a/drivers/usb/input/powermate.c
+++ b/drivers/usb/input/powermate.c
@@ -359,7 +359,7 @@
 
 	input_dev->phys = pm->phys;
 	usb_to_input_id(udev, &input_dev->id);
-	input_dev->cdev.dev = &intf->dev;
+	input_dev->dev.parent = &intf->dev;
 
 	input_set_drvdata(input_dev, pm);