ASoC: sh: dma-sh7760: remove unused variable

cppcheck warning:

sound/soc/sh/dma-sh7760.c:180:6: style: Unused variable: ret
[unusedVariable]
 int ret;
     ^
Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Link: https://lore.kernel.org/r/20210219231635.5749-2-pierre-louis.bossart@linux.intel.comSigned-off-by: Mark Brown <broonie@kernel.org>

sound/soc/sh/dma-sh7760.c

@@ -177,7 +177,6 @@ static int camelot_hw_params(struct snd_soc_component *component,
 	struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream);
 	struct camelot_pcm *cam = &cam_pcm_data[asoc_rtd_to_cpu(rtd, 0)->id];
 	int recv = substream->stream == SNDRV_PCM_STREAM_PLAYBACK ? 0:1;
-	int ret;
 
 	if (recv) {
 		cam->rx_period_size = params_period_bytes(hw_params);