ASoC: codecs: wcd-common: fix signedness bug in wcd_dt_parse_micbias_info()

The error handling does not work because common->micb_vout[] is an array
of u32.  We need a signed variable to store negative error codes.

Fixes: 4f16b63 ("ASoC: codecs: wcd: add common helper for wcd codecs")
Signed-off-by: Dan Carpenter <dan.carpenter@linaro.org>
Reviewed-by: Srinivas Kandagatla <srinivas.kandagatla@oss.qualcomm.com>
Link: https://patch.msgid.link/aNKEZ3VqJ8js208v@stanley.mountain
Signed-off-by: Mark Brown <broonie@kernel.org>

Author: Dan Carpenter

sound/soc/codecs/wcd-common.c

@@ -62,12 +62,13 @@ static int wcd_get_micbias_val(struct device *dev, int micb_num, u32 *micb_mv)
 
 int wcd_dt_parse_micbias_info(struct wcd_common *common)
 {
-	int i;
+	int ret, i;
 
 	for (i = 0; i < common->max_bias; i++) {
-		common->micb_vout[i] = wcd_get_micbias_val(common->dev, i + 1, &common->micb_mv[i]);
-		if (common->micb_vout[i] < 0)
-			return -EINVAL;
+		ret = wcd_get_micbias_val(common->dev, i + 1, &common->micb_mv[i]);
+		if (ret < 0)
+			return ret;
+		common->micb_vout[i] = ret;
 	}
 
 	return 0;