ASoC: Tegra: Retrieve card from DAPM context not codec

Card widgets are created in the card's DAPM context, not any codec's DAPM
context. Hence, w->codec==NULL. Instead, find the card from the widget
through the DAPM context of the widget, not the codec of the widget.
Signed-off-by: NStephen Warren <swarren@nvidia.com>
Acked-by: NLiam Girdwood <lrg@ti.com>
Signed-off-by: NMark Brown <broonie@opensource.wolfsonmicro.com>

sound/soc/tegra/tegra_wm8903.c

@@ -156,8 +156,8 @@ static struct snd_soc_jack_pin tegra_wm8903_mic_jack_pins[] = {
 static int tegra_wm8903_event_int_spk(struct snd_soc_dapm_widget *w,
 					struct snd_kcontrol *k, int event)
 {
-	struct snd_soc_codec *codec = w->codec;
-	struct snd_soc_card *card = codec->card;
+	struct snd_soc_dapm_context *dapm = w->dapm;
+	struct snd_soc_card *card = dapm->card;
 	struct tegra_wm8903 *machine = snd_soc_card_get_drvdata(card);
 	struct tegra_wm8903_platform_data *pdata = machine->pdata;
 
@@ -173,8 +173,8 @@ static int tegra_wm8903_event_int_spk(struct snd_soc_dapm_widget *w,
 static int tegra_wm8903_event_hp(struct snd_soc_dapm_widget *w,
 					struct snd_kcontrol *k, int event)
 {
-	struct snd_soc_codec *codec = w->codec;
-	struct snd_soc_card *card = codec->card;
+	struct snd_soc_dapm_context *dapm = w->dapm;
+	struct snd_soc_card *card = dapm->card;
 	struct tegra_wm8903 *machine = snd_soc_card_get_drvdata(card);
 	struct tegra_wm8903_platform_data *pdata = machine->pdata;