ASoC: Convert wm8990 MICBIAS to a supply widget

Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>

sound/soc/codecs/wm8990.c

@@ -776,8 +776,8 @@ SND_SOC_DAPM_PGA("ROPGA", WM8990_POWER_MANAGEMENT_3, WM8990_ROPGA_ENA_BIT, 0,
 	NULL, 0),
 
 /* MICBIAS */
-SND_SOC_DAPM_MICBIAS("MICBIAS", WM8990_POWER_MANAGEMENT_1,
-	WM8990_MICBIAS_ENA_BIT, 0),
+SND_SOC_DAPM_SUPPLY("MICBIAS", WM8990_POWER_MANAGEMENT_1,
+		    WM8990_MICBIAS_ENA_BIT, 0, NULL, 0),
 
 SND_SOC_DAPM_OUTPUT("LON"),
 SND_SOC_DAPM_OUTPUT("LOP"),