ALSA: hda - Drop spec->channel_mode field from hda_gen_spec

It's never used in the generic parser.  It was there from the old
Realtek code, which has been dropped quite ago, too.
Signed-off-by: Takashi Iwai <tiwai@suse.de>

sound/pci/hda/hda_generic.c

@@ -3258,7 +3258,6 @@ int snd_hda_gen_build_pcms(struct hda_codec *codec)
 	struct hda_pcm *info = spec->pcm_rec;
 	const struct hda_pcm_stream *p;
 	bool have_multi_adcs;
-	int i;
 
 	codec->num_pcms = 1;
 	codec->pcm_info = info;
@@ -3296,15 +3295,6 @@ int snd_hda_gen_build_pcms(struct hda_codec *codec)
 		info->stream[SNDRV_PCM_STREAM_CAPTURE].nid = spec->adc_nids[0];
 	}
 
-	if (spec->channel_mode) {
-		info->stream[SNDRV_PCM_STREAM_PLAYBACK].channels_max = 0;
-		for (i = 0; i < spec->num_channel_mode; i++) {
-			if (spec->channel_mode[i].channels > info->stream[SNDRV_PCM_STREAM_PLAYBACK].channels_max) {
-				info->stream[SNDRV_PCM_STREAM_PLAYBACK].channels_max = spec->channel_mode[i].channels;
-			}
-		}
-	}
-
  skip_analog:
 	/* SPDIF for stream index #1 */
 	if (spec->multiout.dig_out_nid || spec->dig_in_nid) {

sound/pci/hda/hda_generic.h

@@ -101,8 +101,6 @@ struct hda_gen_spec {
 	unsigned int cur_mux[3];
 
 	/* channel model */
-	const struct hda_channel_mode *channel_mode;
-	int num_channel_mode;
 	int const_channel_count;	/* min. channel count (for speakers) */
 	int ext_channel_count;		/* current channel count for multi-io */