ASoC: codecs: wsa884x: Implement temperature reading and hwmon

Read temperature of the speaker and expose it via hwmon interface, which
will be later used during calibration of speaker protection algorithms.

Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Link: https://patch.msgid.link/20240809110122.137761-1-krzysztof.kozlowski@linaro.org


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