ASoC: rt5651: remove useless assignment

cppcheck warning:

sound/soc/codecs/rt5651.c:1786:13: style: Variable 'report' is
assigned a value that is never used. [unreadVariable]
 int report = 0;
            ^

Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Link: https://lore.kernel.org/r/20210302212527.55158-13-pierre-louis.bossart@linux.intel.com


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