ALSA: hda - More relax for pending period handling

Since the pending periods are often bogus and take long time until
actually processed, it often results in a high CPU usage of the hd-audio
workq.  Overall it's better to have low CPU consumption by avoiding a
too tight loop rather than the wake-up timing accuracy.
Signed-off-by: Takashi Iwai <tiwai@suse.de>

sound/pci/hda/hda_intel.c

@@ -1961,7 +1961,7 @@ static void azx_irq_pending_work(struct work_struct *work)
 		spin_unlock_irq(&chip->reg_lock);
 		if (!pending)
 			return;
-		cond_resched();
+		msleep(1);
 	}
 }