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>