ASoC: codecs: mt6359-accdet: remove useless initialization

cppcheck warning

sound/soc/codecs/mt6359-accdet.c:417:10: style: Variable 'ret' is
assigned a value that is never used. [unreadVariable]
 int ret = 0;
         ^

sound/soc/codecs/mt6359-accdet.c:464:10: style: Variable 'ret' is
assigned a value that is never used. [unreadVariable]
 int ret = 0;
         ^

Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Link: https://lore.kernel.org/r/20210426214701.235106-2-pierre-louis.bossart@linux.intel.com


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