ASoC: Convert WM8962 MICBIAS to a supply widget

A supply widget is generally clearer than a MICBIAS widget and a mic bias
is just a type of supply so use a supply widget for the MICBIAS. This also
avoids confusion with the routing when connected to multiple inputs.

Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
diff --git a/sound/soc/samsung/speyside_wm8962.c b/sound/soc/samsung/speyside_wm8962.c
index 98b28ea..35539eb 100644
--- a/sound/soc/samsung/speyside_wm8962.c
+++ b/sound/soc/samsung/speyside_wm8962.c
@@ -152,12 +152,12 @@
 	{ "Main Speaker", NULL, "SPKOUTL" },
 	{ "Main Speaker", NULL, "SPKOUTR" },
 
-	{ "MICBIAS", NULL, "Headset Mic" },
-	{ "IN4L", NULL, "MICBIAS" },
-	{ "IN4R", NULL, "MICBIAS" },
+	{ "Headset Mic", NULL, "MICBIAS" },
+	{ "IN4L", NULL, "Headset Mic" },
+	{ "IN4R", NULL, "Headset Mic" },
 
-	{ "MICBIAS", NULL, "DMIC" },
-	{ "DMICDAT", NULL, "MICBIAS" },
+	{ "DMIC", NULL, "MICBIAS" },
+	{ "DMICDAT", NULL, "DMIC" },
 };
 
 static struct snd_soc_jack speyside_wm8962_headset;