ALSA: hda - Fix caching of SPDIF status bits

SPDIF status bits controls are written via snd_hda_codec_write()
without caching.  This causes a regression at resume that the bits
are lost.

Simply replacing it with the cached version fixes the problem.

Reference:
	http://lkml.org/lkml/2008/11/24/324

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

sound/pci/hda/hda_codec.c

@@ -1436,12 +1436,12 @@ static void set_dig_out(struct hda_codec *codec, hda_nid_t nid,
 {
 	hda_nid_t *d;
 
-	snd_hda_codec_write(codec, nid, 0, verb, val);
+	snd_hda_codec_write_cache(codec, nid, 0, verb, val);
 	d = codec->slave_dig_outs;
 	if (!d)
 		return;
 	for (; *d; d++)
-		snd_hda_codec_write(codec, *d, 0, verb, val);
+		snd_hda_codec_write_cache(codec, *d, 0, verb, val);
 }
 
 static inline void set_dig_out_convert(struct hda_codec *codec, hda_nid_t nid,