ASoC: soc-pcm: remove redundant assignment

ASoC: soc-pcm: remove redundant assignment

cppcheck warning:

sound/soc/soc-pcm.c:2398:7: style: Variable 'ret' is reassigned a
value before the old one has been used. [redundantAssignment]
  ret = -EINVAL;
      ^
sound/soc/soc-pcm.c:2395:7: note: ret is assigned
  ret = -EINVAL;
      ^
sound/soc/soc-pcm.c:2398:7: note: ret is overwritten
  ret = -EINVAL;
      ^

This looks like a copy/paste or git merge issue.

Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Link: https://lore.kernel.org/r/20210218221921.88991-3-pierre-louis.bossart@linux.intel.com
Signed-off-by: Mark Brown <broonie@kernel.org>