Input: ppc-beep - 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.

Also, do not access input_dev->private directly, use helpers.
Signed-off-by: Dmitry Torokhov <dtor@mail.ru>

sound/ppc/beep.c

@@ -118,7 +118,7 @@ static int snd_pmac_beep_event(struct input_dev *dev, unsigned int type,
 	default: return -1;
 	}
 
-	chip = dev->private;
+	chip = input_get_drvdata(dev);
 	if (! chip || (beep = chip->beep) == NULL)
 		return -1;
 
@@ -239,8 +239,8 @@ int __init snd_pmac_attach_beep(struct snd_pmac *chip)
 	input_dev->evbit[0] = BIT(EV_SND);
 	input_dev->sndbit[0] = BIT(SND_BELL) | BIT(SND_TONE);
 	input_dev->event = snd_pmac_beep_event;
-	input_dev->private = chip;
-	input_dev->cdev.dev = &chip->pdev->dev;
+	input_dev->dev.parent = &chip->pdev->dev;
+	input_set_drvdata(input_dev, chip);
 
 	beep->dev = input_dev;
 	beep->buf = dmabuf;