ASoC: tlv320adcx140: Fix mic_bias and vref device tree verification

Fix the range verification check for the mic_bias and vref device tree
entries.

Fixes 37bde5acf040 ("ASoC: tlv320adcx140: Add the tlv320adcx140 codec driver family")
Signed-off-by: Dan Murphy <dmurphy@ti.com>
Link: https://lore.kernel.org/r/20200304193427.16886-1-dmurphy@ti.comSigned-off-by: Mark Brown <broonie@kernel.org>

sound/soc/codecs/tlv320adcx140.c

@@ -748,9 +748,8 @@ static int adcx140_codec_probe(struct snd_soc_component *component)
 	if (ret)
 		bias_source = ADCX140_MIC_BIAS_VAL_VREF;
 
-	if (bias_source != ADCX140_MIC_BIAS_VAL_VREF &&
-	    bias_source != ADCX140_MIC_BIAS_VAL_VREF_1096 &&
-	    bias_source != ADCX140_MIC_BIAS_VAL_AVDD) {
+	if (bias_source < ADCX140_MIC_BIAS_VAL_VREF ||
+	    bias_source > ADCX140_MIC_BIAS_VAL_AVDD) {
 		dev_err(adcx140->dev, "Mic Bias source value is invalid\n");
 		return -EINVAL;
 	}
@@ -760,9 +759,8 @@ static int adcx140_codec_probe(struct snd_soc_component *component)
 	if (ret)
 		vref_source = ADCX140_MIC_BIAS_VREF_275V;
 
-	if (vref_source != ADCX140_MIC_BIAS_VREF_275V &&
-	    vref_source != ADCX140_MIC_BIAS_VREF_25V &&
-	    vref_source != ADCX140_MIC_BIAS_VREF_1375V) {
+	if (vref_source < ADCX140_MIC_BIAS_VREF_275V ||
+	    vref_source > ADCX140_MIC_BIAS_VREF_1375V) {
 		dev_err(adcx140->dev, "Mic Bias source value is invalid\n");
 		return -EINVAL;
 	}