ASoC: Intel: kbl_da7219_max98927: remove unnecessary initialization

Fix cppcheck warning

[sound/soc/intel/boards/kbl_da7219_max98927.c:179]: (style) Variable
'ret' is assigned a value that is never used.

[sound/soc/intel/boards/kbl_da7219_max98927.c:1098]: (style) Variable
'i' is assigned a value that is never used.

Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Link: https://lore.kernel.org/r/20200113210428.27457-9-pierre-louis.bossart@linux.intel.com


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