arm64: dts: sdm845: Add DSI and MDP OPP tables and power-domains

Add the OPP tables for DSI and MDP based on the perf state/clk
requirements, and add the power-domains property to specify the
scalable power domain.

Tested-by: Rob Clark <robdclark@gmail.com>
Signed-off-by: Rajendra Nayak <rnayak@codeaurora.org>
Reviewed-by: Matthias Kaehlcke <mka@chromium.org>
Link: https://lore.kernel.org/r/1594292674-15632-4-git-send-email-rnayak@codeaurora.org


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