ASoC: Remove CODEC pointer from snd_soc_dapm_context

The only remaining user of the CODEC pointer in the DAPM struct is to
initialize the CODEC pointer in the widget struct. The later is scheduled
for removal, but has still a few users left. For now use
dapm->component->codec to initialize it.
Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
Signed-off-by: Mark Brown <broonie@kernel.org>

include/sound/soc-dapm.h

@@ -593,7 +593,6 @@ struct snd_soc_dapm_context {
 
 	struct device *dev; /* from parent - for debug */
 	struct snd_soc_component *component; /* parent component */
-	struct snd_soc_codec *codec; /* parent codec */
 	struct snd_soc_card *card; /* parent card */
 
 	/* used during DAPM updates */

sound/soc/soc-core.c

@@ -4351,7 +4351,6 @@ int snd_soc_register_codec(struct device *dev,
 	if (codec_drv->read)
 		codec->component.read = snd_soc_codec_drv_read;
 	codec->component.ignore_pmdown_time = codec_drv->ignore_pmdown_time;
-	codec->dapm.codec = codec;
 	codec->dapm.idle_bias_off = codec_drv->idle_bias_off;
 	if (codec_drv->seq_notifier)
 		codec->dapm.seq_notifier = codec_drv->seq_notifier;

sound/soc/soc-dapm.c

@@ -3107,7 +3107,7 @@ snd_soc_dapm_new_control(struct snd_soc_dapm_context *dapm,
 	}
 
 	w->dapm = dapm;
-	w->codec = dapm->codec;
+	w->codec = dapm->component->codec;
 	INIT_LIST_HEAD(&w->sources);
 	INIT_LIST_HEAD(&w->sinks);
 	INIT_LIST_HEAD(&w->list);