ASoC: wm8940: Properly set codec->dapm.bias_level

Reported-by: Chris Paulson-Ellis <chris@edesix.com>
Signed-off-by: Axel Lin <axel.lin@gmail.com>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Cc: stable@vger.kernel.org
diff --git a/sound/soc/codecs/wm8940.c b/sound/soc/codecs/wm8940.c
index a4abfdf..dc5cb31 100644
--- a/sound/soc/codecs/wm8940.c
+++ b/sound/soc/codecs/wm8940.c
@@ -488,6 +488,8 @@
 		break;
 	}
 
+	codec->dapm.bias_level = level;
+
 	return ret;
 }