ALSA: hda - Add missing amp cache flush for bound capture vol/sw ctls

The bound capture volume and switch controls use the cached amp
updates, but it's missing the flushing at the end.

Signed-off-by: Takashi Iwai <tiwai@suse.de>

sound/pci/hda/hda_generic.c

@@ -1919,6 +1919,7 @@ static int cap_put_caller(struct snd_kcontrol *kcontrol,
  error:
 	codec->cached_write = 0;
 	mutex_unlock(&codec->control_mutex);
+	snd_hda_codec_flush_amp_cache(codec);
 	if (err >= 0 && spec->cap_sync_hook)
 		spec->cap_sync_hook(codec);
 	return err;