ASoC: soc-acpi: remove useless initialization

cppcheck warning:

value that is never used. [unreadVariable]
 acpi_status status = AE_OK;
                    ^

sound/soc/soc-acpi.c:37:21: style: Variable 'status' is assigned a
Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Reviewed-by: Daniel Baluta <daniel.baluta@gmail.com>
Reviewed-by: Guennadi Liakhovetski <guennadi.liakhovetski@linux.intel.com>
Link: https://lore.kernel.org/r/20210416191144.27006-2-pierre-louis.bossart@linux.intel.com
Signed-off-by: Mark Brown <broonie@kernel.org>