arm64: dts: qcom: Split out SA8155P and use correct RPMh power domains

The RPMhPD setup on SA8155P is different compared to SM8150. Correct
it to ensure the platform will not try accessing forbidden/missing
RPMh entries at boot, as a bad vote will hang the machine.

Signed-off-by: Konrad Dybcio <konrad.dybcio@linaro.org>
Tested-by: Bartosz Golaszewski <bartosz.golaszewski@linaro.org>
Signed-off-by: Bjorn Andersson <andersson@kernel.org>
Link: https://lore.kernel.org/r/20230411-topic-hanaau-v2-3-fd3d70844b31@linaro.org