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

sound/soc/soc-pcm.c

@@ -2395,7 +2395,6 @@ static int dpcm_run_update_startup(struct snd_soc_pcm_runtime *fe, int stream)
 	/* Only start the BE if the FE is ready */
 	if (fe->dpcm[stream].state == SND_SOC_DPCM_STATE_HW_FREE ||
 		fe->dpcm[stream].state == SND_SOC_DPCM_STATE_CLOSE) {
-		ret = -EINVAL;
 		dev_err(fe->dev, "ASoC: FE %s is not ready %d\n",
 			fe->dai_link->name, fe->dpcm[stream].state);
 		ret = -EINVAL;