ASoC: rt5631: Fix return value

Return the value obtained from get_coeff() instead of EINVAL.
Silences a smatch warning.

Signed-off-by: Sachin Kamat <sachin.kamat@linaro.org>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
diff --git a/sound/soc/codecs/rt5631.c b/sound/soc/codecs/rt5631.c
index 960d0e9..d6ca615 100644
--- a/sound/soc/codecs/rt5631.c
+++ b/sound/soc/codecs/rt5631.c
@@ -1382,7 +1382,7 @@
 					timesofbclk);
 	if (coeff < 0) {
 		dev_err(codec->dev, "Fail to get coeff\n");
-		return -EINVAL;
+		return coeff;
 	}
 
 	switch (params_format(params)) {