Input: joysticks - 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/joystick/grip.c b/drivers/input/joystick/grip.c
index 41da7f1..73eb5ab 100644
--- a/drivers/input/joystick/grip.c
+++ b/drivers/input/joystick/grip.c
@@ -363,7 +363,7 @@
 		input_dev->id.vendor = GAMEPORT_ID_VENDOR_GRAVIS;
 		input_dev->id.product = grip->mode[i];
 		input_dev->id.version = 0x0100;
-		input_dev->cdev.dev = &gameport->dev;
+		input_dev->dev.parent = &gameport->dev;
 
 		input_set_drvdata(input_dev, grip);