ASoC: codecs: es8316: fix 'defined but not used' warning

Fix W=1 warning

sound/soc/codecs/es8316.c:842:36: warning: 'es8316_acpi_match' defined
but not used [-Wunused-const-variable=]
  842 | static const struct acpi_device_id es8316_acpi_match[] = {
      |                                    ^~~~~~~~~~~~~~~~~
Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Link: https://lore.kernel.org/r/20200707190612.97799-12-pierre-louis.bossart@linux.intel.comSigned-off-by: Mark Brown <broonie@kernel.org>

sound/soc/codecs/es8316.c

@@ -839,11 +839,13 @@ static const struct of_device_id es8316_of_match[] = {
 };
 MODULE_DEVICE_TABLE(of, es8316_of_match);
 
+#ifdef CONFIG_ACPI
 static const struct acpi_device_id es8316_acpi_match[] = {
 	{"ESSX8316", 0},
 	{},
 };
 MODULE_DEVICE_TABLE(acpi, es8316_acpi_match);
+#endif
 
 static struct i2c_driver es8316_i2c_driver = {
 	.driver = {