ASoC: wm8{350,753,971}: Use snd_soc_dapm_to_codec() instead of dapm->codec

The CODEC struct in the snd_soc_dapm_context struct is deprecated and
scheduled for removal. Use the snd_soc_dapm_to_codec() function instead.
Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
Acked-by: Charles Keepax <ckeepax@opensource.wolfsonmicro.com>
Signed-off-by: Mark Brown <broonie@kernel.org>

sound/soc/codecs/wm8350.c

@@ -212,7 +212,7 @@ static void wm8350_pga_work(struct work_struct *work)
 {
 	struct snd_soc_dapm_context *dapm =
 	    container_of(work, struct snd_soc_dapm_context, delayed_work.work);
-	struct snd_soc_codec *codec = dapm->codec;
+	struct snd_soc_codec *codec = snd_soc_dapm_to_codec(dapm);
 	struct wm8350_data *wm8350_data = snd_soc_codec_get_drvdata(codec);
 	struct wm8350_output *out1 = &wm8350_data->out1,
 	    *out2 = &wm8350_data->out2;

sound/soc/codecs/wm8753.c

@@ -1433,7 +1433,7 @@ static void wm8753_work(struct work_struct *work)
 	struct snd_soc_dapm_context *dapm =
 		container_of(work, struct snd_soc_dapm_context,
 			     delayed_work.work);
-	struct snd_soc_codec *codec = dapm->codec;
+	struct snd_soc_codec *codec = snd_soc_dapm_to_codec(dapm);
 	wm8753_set_bias_level(codec, dapm->bias_level);
 }
 

sound/soc/codecs/wm8971.c

@@ -615,7 +615,7 @@ static void wm8971_work(struct work_struct *work)
 	struct snd_soc_dapm_context *dapm =
 		container_of(work, struct snd_soc_dapm_context,
 			     delayed_work.work);
-	struct snd_soc_codec *codec = dapm->codec;
+	struct snd_soc_codec *codec = snd_soc_dapm_to_codec(dapm);
 	wm8971_set_bias_level(codec, codec->dapm.bias_level);
 }