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>