ASoC: da9055: 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/da9055.c:1522:34: warning: ‘da9055_of_match’ defined but not used [-Wunused-const-variable=]
Signed-off-by: Krzysztof Kozlowski <krzk@kernel.org>
Link: https://lore.kernel.org/r/20201125164452.89239-20-krzk@kernel.orgSigned-off-by: Mark Brown <broonie@kernel.org>

sound/soc/codecs/da9055.c

@@ -1519,11 +1519,13 @@ static const struct i2c_device_id da9055_i2c_id[] = {
 };
 MODULE_DEVICE_TABLE(i2c, da9055_i2c_id);
 
+#ifdef CONFIG_OF
 static const struct of_device_id da9055_of_match[] = {
 	{ .compatible = "dlg,da9055-codec", },
 	{ }
 };
 MODULE_DEVICE_TABLE(of, da9055_of_match);
+#endif
 
 /* I2C codec control layer */
 static struct i2c_driver da9055_i2c_driver = {