ASoC: codecs: wcd938x: fix return value of mixer put function

ASoC: codecs: wcd938x: fix return value of mixer put function

commit bd2347fd67d8da0fa76296507cc556da0a233bcb upstream.

wcd938x_ear_pa_put_gain, wcd938x_set_swr_port and  wcd938x_set_compander
currently returns zero eventhough it changes the value.
Fix this, so that change notifications are sent correctly.

Fixes: e8ba1e05bdc01 ("ASoC: codecs: wcd938x: add basic controls")
Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org>
Link: https://lore.kernel.org/r/20220126113549.8853-4-srinivas.kandagatla@linaro.org
Signed-off-by: Mark Brown <broonie@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>