cppcheck warning:

drivers/soundwire/intel.c:1487:10: style: Variable 'ret' is assigned a
value that is never used. [unreadVariable]
 int ret = 0;
         ^
Signed-off-by: NPierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Reviewed-by: NPéter Ujfalusi <peter.ujfalusi@linux.intel.com>
Reviewed-by: NRander Wang <rander.wang@intel.com>
Signed-off-by: NBard Liao <yung-chuan.liao@linux.intel.com>
Acked-By: NVinod Koul <vkoul@kernel.org>
Link: https://lore.kernel.org/r/20211224021034.26635-7-yung-chuan.liao@linux.intel.comSigned-off-by: NMark Brown <broonie@kernel.org>