ASoC: wm_adsp: simplify return value

cppcheck warning:

sound/soc/codecs/wm_adsp.c:2092:9: warning: Identical condition and
return expression 'ret', return value is always 0
[identicalConditionAfterEarlyExit]
 return ret;
        ^
sound/soc/codecs/wm_adsp.c:2070:6: note: If condition 'ret' is true,
the function will return/exit
 if (ret)
     ^
sound/soc/codecs/wm_adsp.c:2092:9: note: Returning identical
expression 'ret'
 return ret;
        ^

Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Acked-by: Charles Keepax <ckeepax@opensource.cirrus.com>
Link: https://lore.kernel.org/r/20210311004332.120901-10-pierre-louis.bossart@linux.intel.com


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