ASoC: omap3pandora: Fix compilation error

Fixes:
sound/soc/omap/omap3pandora.c: In function ‘omap3pandora_dac_event’:
sound/soc/omap/omap3pandora.c:92:19: error: request for member ‘dev’ in something not a structure or union
make[3]: *** [sound/soc/omap/omap3pandora.o] Error 1

Which is introduced by:
dd194b48 ASoC: omap: Check regulator enable for DAC on Pandora
Signed-off-by: NPeter Ujfalusi <peter.ujfalusi@ti.com>
Signed-off-by: NMark Brown <broonie@opensource.wolfsonmicro.com>

sound/soc/omap/omap3pandora.c

@@ -89,7 +89,7 @@ static int omap3pandora_dac_event(struct snd_soc_dapm_widget *w,
 	if (SND_SOC_DAPM_EVENT_ON(event)) {
 		ret = regulator_enable(omap3pandora_dac_reg);
 		if (ret) {
-			dev_err(w->dapm.dev, "Failed to power DAC: %d\n", ret);
+			dev_err(w->dapm->dev, "Failed to power DAC: %d\n", ret);
 			return ret;
 		}
 		mdelay(1);