ASoC: qcom: lpass-platform: remove useless assignment

cppcheck warning:

sound/soc/qcom/lpass-platform.c:791:10: style: Variable 'ret' is
assigned a value that is never used. [unreadVariable]
 int ret = -EINVAL;
         ^
Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Reviewed-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org>
Link: https://lore.kernel.org/r/20210218222916.89809-3-pierre-louis.bossart@linux.intel.comSigned-off-by: Mark Brown <broonie@kernel.org>

sound/soc/qcom/lpass-platform.c

@@ -788,7 +788,7 @@ static int lpass_platform_pcm_new(struct snd_soc_component *component,
 {
 	struct snd_pcm *pcm = soc_runtime->pcm;
 	struct snd_pcm_substream *psubstream, *csubstream;
-	int ret = -EINVAL;
+	int ret;
 	size_t size = lpass_platform_pcm_hardware.buffer_bytes_max;
 
 	psubstream = pcm->streams[SNDRV_PCM_STREAM_PLAYBACK].substream;