Input: mice - 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/input/mouse/sermouse.c b/drivers/input/mouse/sermouse.c
index 1cb40e7..77b8ee2 100644
--- a/drivers/input/mouse/sermouse.c
+++ b/drivers/input/mouse/sermouse.c
@@ -266,7 +266,7 @@
 	input_dev->id.vendor  = sermouse->type;
 	input_dev->id.product = c;
 	input_dev->id.version = 0x0100;
-	input_dev->cdev.dev = &serio->dev;
+	input_dev->dev.parent = &serio->dev;
 
 	input_dev->evbit[0] = BIT(EV_KEY) | BIT(EV_REL);
 	input_dev->keybit[LONG(BTN_MOUSE)] = BIT(BTN_LEFT) | BIT(BTN_RIGHT);