ASoC: wm5100/wm8903/wm8996: Replace open-coded snd_soc_dapm_to_codec()

We now have a generic helper function to cast from a DAPM context to a CODEC.
Make use of it in the places which previously open-coded it.

Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
Acked-by: Charles Keepax <ckeepax@opensource.wolfsonmicro.com>
Signed-off-by: Mark Brown <broonie@linaro.org>

sound/soc/codecs/wm5100.c

@@ -735,8 +735,7 @@ WM5100_MIXER_CONTROLS("LHPF4", WM5100_HPLP4MIX_INPUT_1_SOURCE),
 static void wm5100_seq_notifier(struct snd_soc_dapm_context *dapm,
 				enum snd_soc_dapm_type event, int subseq)
 {
-	struct snd_soc_codec *codec = container_of(dapm,
-						   struct snd_soc_codec, dapm);
+	struct snd_soc_codec *codec = snd_soc_dapm_to_codec(dapm);
 	struct wm5100_priv *wm5100 = snd_soc_codec_get_drvdata(codec);
 	u16 val, expect, i;
 

sound/soc/codecs/wm8903.c

@@ -281,8 +281,7 @@ static int wm8903_dcs_event(struct snd_soc_dapm_widget *w,
 static void wm8903_seq_notifier(struct snd_soc_dapm_context *dapm,
 				enum snd_soc_dapm_type event, int subseq)
 {
-	struct snd_soc_codec *codec = container_of(dapm,
-						   struct snd_soc_codec, dapm);
+	struct snd_soc_codec *codec = snd_soc_dapm_to_codec(dapm);
 	struct wm8903_priv *wm8903 = snd_soc_codec_get_drvdata(codec);
 	int dcs_mode = WM8903_DCS_MODE_WRITE_STOP;
 	int i, val;

sound/soc/codecs/wm8996.c

@@ -690,8 +690,7 @@ static void wait_for_dc_servo(struct snd_soc_codec *codec, u16 mask)
 static void wm8996_seq_notifier(struct snd_soc_dapm_context *dapm,
 				enum snd_soc_dapm_type event, int subseq)
 {
-	struct snd_soc_codec *codec = container_of(dapm,
-						   struct snd_soc_codec, dapm);
+	struct snd_soc_codec *codec = snd_soc_dapm_to_codec(dapm);
 	struct wm8996_priv *wm8996 = snd_soc_codec_get_drvdata(codec);
 	u16 val, mask;