ASoC: codecs: wcd937x: drop bogus container_of() error handling

ASoC: codecs: wcd937x: drop bogus container_of() error handling

The dev_to_sdw_dev() helper uses container_of() to return the containing
soundwire device structure of its pointer argument and will never return
NULL.

Fixes: 9be3ec196da4 ("ASoC: codecs: wcd937x: add wcd937x codec driver")
Cc: Prasad Kumpatla <prasad.kumpatla@oss.qualcomm.com>
Signed-off-by: Johan Hovold <johan@kernel.org>
Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@oss.qualcomm.com>
Link: https://patch.msgid.link/20251219142715.19254-3-johan@kernel.org
Signed-off-by: Mark Brown <broonie@kernel.org>