ASoC: zx-tdm: remove redundant assignment to ts_width on error return path

The value assigned to ts_width is never read on the error return path
so the assignment is redundant and can be removed.  Remove it.

Addresses-Coverity: ("Unused value")
Signed-off-by: Colin Ian King <colin.king@canonical.com>
Link: https://lore.kernel.org/r/20190731223234.16153-1-colin.king@canonical.com
Signed-off-by: Mark Brown <broonie@kernel.org>

sound/soc/zte/zx-tdm.c

@@ -211,7 +211,6 @@ static int zx_tdm_hw_params(struct snd_pcm_substream *substream,
 		ts_width = 1;
 		break;
 	default:
-		ts_width = 0;
 		dev_err(socdai->dev, "Unknown data format\n");
 		return -EINVAL;
 	}