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/spaceorb.c b/drivers/input/joystick/spaceorb.c
index f5e4966..c4937f1 100644
--- a/drivers/input/joystick/spaceorb.c
+++ b/drivers/input/joystick/spaceorb.c
@@ -183,7 +183,7 @@
 	input_dev->id.vendor = SERIO_SPACEORB;
 	input_dev->id.product = 0x0001;
 	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_ABS);