arm64: dts: qcom: sm8550: Add missing RPMhPD OPP levels

We need more granularity for things like the GPU. Add the missing levels.

This unfortunately requires some re-indexing, resulting in an ugly diff.
Rename the nodes to prevent that in the future.

Signed-off-by: Konrad Dybcio <konrad.dybcio@linaro.org>
Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Signed-off-by: Bjorn Andersson <andersson@kernel.org>
Link: https://lore.kernel.org/r/20230517-topic-kailua-rpmhpd-v2-3-3063ce19c491@linaro.org