arm64: dts: sc7180: Add OPP table for all qup devices

qup has a requirement to vote on the performance state of the CX domain
in sc7180 devices. Add OPP tables for these and also add power-domains
property for all qup instances for uart and spi.
i2c does not support scaling and uses a fixed clock.

Reviewed-by: Matthias Kaehlcke <mka@chromium.org>
Signed-off-by: Rajendra Nayak <rnayak@codeaurora.org>
Link: https://lore.kernel.org/r/1593506712-24557-3-git-send-email-rnayak@codeaurora.org


Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>