ASoC: fix deemphasis control in wm8904/55/60 codecs

Deemphasis control's .get callback should update control's value instead
of returning it - return value of callback function is used for indicating
error or success of operation.

Signed-off-by: Dmitry Artamonow <mad_soft@inbox.ru>
Acked-by: Liam Girdwood <lrg@slimlogic.co.uk>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Cc: stable@kernel.org
diff --git a/sound/soc/codecs/wm8960.c b/sound/soc/codecs/wm8960.c
index 8d5efb3..21986c4 100644
--- a/sound/soc/codecs/wm8960.c
+++ b/sound/soc/codecs/wm8960.c
@@ -138,7 +138,8 @@
 	struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
 	struct wm8960_priv *wm8960 = snd_soc_codec_get_drvdata(codec);
 
-	return wm8960->deemph;
+	ucontrol->value.enumerated.item[0] = wm8960->deemph;
+	return 0;
 }
 
 static int wm8960_put_deemph(struct snd_kcontrol *kcontrol,