ASoC: tas5086: signedness bug in tas5086_hw_params()

"val" has to be signed for the error handling to work.

Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Acked-by: Daniel Mack <zonque@gmail.com>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
diff --git a/sound/soc/codecs/tas5086.c b/sound/soc/codecs/tas5086.c
index 40cee84..d447c4a 100644
--- a/sound/soc/codecs/tas5086.c
+++ b/sound/soc/codecs/tas5086.c
@@ -251,7 +251,7 @@
 {
 	struct snd_soc_codec *codec = dai->codec;
 	struct tas5086_private *priv = snd_soc_codec_get_drvdata(codec);
-	unsigned int val;
+	int val;
 	int ret;
 
 	priv->rate = params_rate(params);