ASoC: codecs: wcd9335: Drop unused sido_input_src field

Member wcd9335_codec.sido_input_src is not read anywhere after
assignment, so it can be safely dropped.

Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Reviewed-by: Srinivas Kandagatla <srinivas.kandagatla@oss.qualcomm.com>
Link: https://patch.msgid.link/20250528-asoc-const-unused-v1-3-19a5d07b9d5c@linaro.org


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