Document power-domains and operating-points-v2 to allow making
performance state votes for certain clock frequencies of the SPI QUP
controller.
Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Signed-off-by: Stephan Gerhold <stephan.gerhold@kernkonzept.com>
Link: https://lore.kernel.org/r/20230919-spi-qup-dvfs-v2-1-1bac2e9ab8db@kernkonzept.comSigned-off-by: Mark Brown <broonie@kernel.org>