ALSA: hda - Force to reset IEC958 status bits for AD codecs

Several bug reports suggest that the forcibly resetting IEC958 status
bits is required for AD codecs to get the SPDIF output working
properly after changing streams.

Original fix credit to Javeed Shaikh.

BugLink: https://bugs.launchpad.net/ubuntu/+source/alsa-driver/+bug/359361

Reported-by: Robin Kreis <r.kreis@uni-bremen.de>
Cc: <stable@vger.kernel.org>
Signed-off-by: Takashi Iwai <tiwai@suse.de>

sound/pci/hda/patch_analog.c

@@ -545,6 +545,7 @@ static int ad198x_build_pcms(struct hda_codec *codec)
 	if (spec->multiout.dig_out_nid) {
 		info++;
 		codec->num_pcms++;
+		codec->spdif_status_reset = 1;
 		info->name = "AD198x Digital";
 		info->pcm_type = HDA_PCM_TYPE_SPDIF;
 		info->stream[SNDRV_PCM_STREAM_PLAYBACK] = ad198x_pcm_digital_playback;