ASoC: tlv320: skip of_device_id table when !CONFIG_OF

The driver can match by multiple methods.  Its of_device_id table is
referenced via of_match_ptr() so it will be unused for !CONFIG_OF
builds:

  sound/soc/codecs/tlv320aic23-i2c.c:38:34: warning: ‘tlv320aic23_of_match’ defined but not used [-Wunused-const-variable=]
  sound/soc/codecs/tlv320adcx140.c:1076:34: warning: ‘tlv320adcx140_of_match’ defined but not used [-Wunused-const-variable=]
Signed-off-by: Krzysztof Kozlowski <krzk@kernel.org>
Link: https://lore.kernel.org/r/20201125164452.89239-32-krzk@kernel.orgSigned-off-by: Mark Brown <broonie@kernel.org>

sound/soc/codecs/tlv320adcx140.c

@@ -1073,6 +1073,7 @@ static struct snd_soc_dai_driver adcx140_dai_driver[] = {
 	}
 };
 
+#ifdef CONFIG_OF
 static const struct of_device_id tlv320adcx140_of_match[] = {
 	{ .compatible = "ti,tlv320adc3140" },
 	{ .compatible = "ti,tlv320adc5140" },
@@ -1080,6 +1081,7 @@ static const struct of_device_id tlv320adcx140_of_match[] = {
 	{},
 };
 MODULE_DEVICE_TABLE(of, tlv320adcx140_of_match);
+#endif
 
 static int adcx140_i2c_probe(struct i2c_client *i2c,
 			     const struct i2c_device_id *id)

sound/soc/codecs/tlv320aic23-i2c.c

@@ -35,11 +35,13 @@ static const struct i2c_device_id tlv320aic23_id[] = {
 
 MODULE_DEVICE_TABLE(i2c, tlv320aic23_id);
 
+#ifdef CONFIG_OF
 static const struct of_device_id tlv320aic23_of_match[] = {
 	{ .compatible = "ti,tlv320aic23", },
 	{ }
 };
 MODULE_DEVICE_TABLE(of, tlv320aic23_of_match);
+#endif
 
 static struct i2c_driver tlv320aic23_i2c_driver = {
 	.driver = {