ASoC: codecs: wcd-mbhc: add runtime pm support

under low power state a SoundWire Wake IRQ could trigger MBHC interrupts
so make sure that codec is not in suspended state when this happens.

Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org>
Link: https://lore.kernel.org/r/20220224111718.6264-17-srinivas.kandagatla@linaro.org


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