ASoC: SOF: ops: don't return void value

Sparse throws the following warning:

sound/soc/sof/ops.h:247:17: error: returning void-valued expression

Remove the useless returns.

Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Reviewed-by: Paul Olaru <paul.olaru@oss.nxp.com>
Reviewed-by: Guennadi Liakhovetski <guennadi.liakhovetski@linux.intel.com>
Reviewed-by: Rander Wang <rander.wang@intel.com>
Signed-off-by: Kai Vehmanen <kai.vehmanen@linux.intel.com>
Link: https://lore.kernel.org/r/20210521092804.3721324-7-kai.vehmanen@linux.intel.com


Signed-off-by: Mark Brown <broonie@kernel.org>