HID: 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>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
diff --git a/drivers/hid/usbhid/hid-tmff.c b/drivers/hid/usbhid/hid-tmff.c
index ab67331..ab5ba6ef 100644
--- a/drivers/hid/usbhid/hid-tmff.c
+++ b/drivers/hid/usbhid/hid-tmff.c
@@ -59,7 +59,7 @@
 
 static int hid_tmff_play(struct input_dev *dev, void *data, struct ff_effect *effect)
 {
-	struct hid_device *hid = dev->private;
+	struct hid_device *hid = input_get_drvdata(dev);
 	struct tmff_device *tmff = data;
 	int left, right;	/* Rumbling */