ASoC: soc-pcm: fix BE transition for TRIGGER_START

ASoC: soc-pcm: fix BE transition for TRIGGER_START

A obvious editing mistake caught with a cppcheck warning

sound/soc/soc-pcm.c:2132:8: style: Variable 'ret' is reassigned a
value before the old one has been used. [redundantAssignment]
   ret = soc_pcm_trigger(be_substream, cmd);
       ^
sound/soc/soc-pcm.c:2126:9: note: ret is assigned
    ret = soc_pcm_trigger(be_substream,
        ^
sound/soc/soc-pcm.c:2129:9: note: ret is assigned
    ret = soc_pcm_trigger(be_substream,
        ^

Fixes: 374b50e234a3e ('ASoC: soc-pcm: improve BE transition for TRIGGER_START')
Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Reviewed-by: Bard Liao <yung-chuan.liao@linux.intel.com>
Reviewed-by: Péter Ujfalusi <peter.ujfalusi@linux.intel.com>
Link: https://lore.kernel.org/r/20220520210615.607229-1-pierre-louis.bossart@linux.intel.com
Signed-off-by: Mark Brown <broonie@kernel.org>