ASoC: cs42l51: Replace w->codec snd_soc_dapm_to_codec(w->dapm)

The codec field of the snd_soc_widget struct is eventually going to be
removed, use snd_soc_dapm_to_codec(w->dapm) instead.

Signed-off-by: Lars-Peter Clausen <[e-mail]>
Acked-by: Brian Austin <[e-mail]>
Signed-off-by: Mark Brown <[e-mail]>

sound/soc/codecs/cs42l51.c

···
 static int cs42l51_pdn_event(struct snd_soc_dapm_widget *w,
 		struct snd_kcontrol *kcontrol, int event)
 {
+	struct snd_soc_codec *codec = snd_soc_dapm_to_codec(w->dapm);
+
 	switch (event) {
 	case SND_SOC_DAPM_PRE_PMD:
-		snd_soc_update_bits(w->codec, CS42L51_POWER_CTL1,
+		snd_soc_update_bits(codec, CS42L51_POWER_CTL1,
 				    CS42L51_POWER_CTL1_PDN,
 				    CS42L51_POWER_CTL1_PDN);
 		break;
 	default:
 	case SND_SOC_DAPM_POST_PMD:
-		snd_soc_update_bits(w->codec, CS42L51_POWER_CTL1,
+		snd_soc_update_bits(codec, CS42L51_POWER_CTL1,
 				    CS42L51_POWER_CTL1_PDN, 0);
 		break;
 	}