ASoC: da7219-aad: remove useless initialization

ASoC: da7219-aad: remove useless initialization

cppcheck warning:

sound/soc/codecs/da7219-aad.c:118:22: style: Variable 'ret' is
assigned a value that is never used. [unreadVariable]
 int report = 0, ret = 0;
                     ^

Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Acked-by: Adam Thomson <Adam.Thomson.Opensource@diasemi.com>
Link: https://lore.kernel.org/r/20210312182246.5153-8-pierre-louis.bossart@linux.intel.com
Signed-off-by: Mark Brown <broonie@kernel.org>