ALSA: hrtimer - Use hard-irq callback

Use the hard-irq mode for the callback (for possible removal of
soft-irq mode in future).
Signed-off-by: NTakashi Iwai <tiwai@suse.de>

sound/core/hrtimer.c

@@ -57,7 +57,7 @@ static int snd_hrtimer_open(struct snd_timer *t)
 		return -ENOMEM;
 	hrtimer_init(&stime->hrt, CLOCK_MONOTONIC, HRTIMER_MODE_REL);
 	stime->timer = t;
-	stime->hrt.cb_mode = HRTIMER_CB_SOFTIRQ;
+	stime->hrt.cb_mode = HRTIMER_CB_IRQSAFE_UNLOCKED;
 	stime->hrt.function = snd_hrtimer_callback;
 	t->private_data = stime;
 	return 0;
@@ -93,9 +93,7 @@ static int snd_hrtimer_stop(struct snd_timer *t)
 }
 
 static struct snd_timer_hardware hrtimer_hw = {
-	.flags =	(SNDRV_TIMER_HW_AUTO |
-			 /*SNDRV_TIMER_HW_FIRST |*/
-			 SNDRV_TIMER_HW_TASKLET),
+	.flags =	SNDRV_TIMER_HW_AUTO,
 	.open =		snd_hrtimer_open,
 	.close =	snd_hrtimer_close,
 	.start =	snd_hrtimer_start,