ASoC: codecs: wcd938x: fix missing clsh ctrl error handling

Allocation of the clash control structure may fail so add the missing
error handling to avoid dereferencing an error pointer.

Fixes: 8d78602a ("ASoC: codecs: wcd938x: add basic driver")
Cc: stable@vger.kernel.org	# 5.14
Cc: Srinivas Kandagatla <srinivas.kandagatla@linaro.org>
Signed-off-by: Johan Hovold <johan+linaro@kernel.org>
Reviewed-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org>
Link: https://lore.kernel.org/r/20230705123018.30903-4-johan+linaro@kernel.org


Signed-off-by: Mark Brown <broonie@kernel.org>