arm64: dts: qcom: sc7180: Add OPP tables and power-domains for venus

Add the OPP tables in order to be able to vote on the performance state
of a power-domain

Signed-off-by: Rajendra Nayak <rnayak@codeaurora.org>
Link: https://lore.kernel.org/r/1598970026-7199-6-git-send-email-rnayak@codeaurora.org


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