ASoC: dapm: Remove platform field from widget and dapm context struct

The platform field in the snd_soc_dapm_widget and snd_soc_dapm_context structs
is now unused can be removed. New code that wants to get the platform for a
widget or dapm context should use snd_soc_dapm_to_platform(w->dapm) or
snd_soc_dapm_to_platform(dapm).
Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
Signed-off-by: Mark Brown <broonie@linaro.org>

include/sound/soc-dapm.h

@@ -526,7 +526,6 @@ struct snd_soc_dapm_widget {
 	const char *name;		/* widget name */
 	const char *sname;	/* stream name */
 	struct snd_soc_codec *codec;
-	struct snd_soc_platform *platform;
 	struct list_head list;
 	struct snd_soc_dapm_context *dapm;
 
@@ -595,7 +594,6 @@ 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_platform *platform; /* parent platform */
 	struct snd_soc_card *card; /* parent card */
 
 	/* used during DAPM updates */

sound/soc/soc-core.c

@@ -4159,7 +4159,6 @@ int snd_soc_add_platform(struct device *dev, struct snd_soc_platform *platform,
 
 	platform->dev = dev;
 	platform->driver = platform_drv;
-	platform->component.dapm.platform = platform;
 	if (platform_drv->write)
 		platform->component.write = snd_soc_platform_drv_write;
 	if (platform_drv->read)

sound/soc/soc-dapm.c

@@ -3097,7 +3097,6 @@ snd_soc_dapm_new_control(struct snd_soc_dapm_context *dapm,
 
 	w->dapm = dapm;
 	w->codec = dapm->codec;
-	w->platform = dapm->platform;
 	INIT_LIST_HEAD(&w->sources);
 	INIT_LIST_HEAD(&w->sinks);
 	INIT_LIST_HEAD(&w->list);