arm64: dts: qcom: sm8450-qrd: Add rpmh regulator nodes

Add the RPMH regulators found in QRD-SM8450 platform

Signed-off-by: Vinod Koul <vkoul@kernel.org>
Reviewed-by: Konrad Dybcio <konrad.dybcio@somainline.org>
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
Link: https://lore.kernel.org/r/20211215043440.605624-7-vkoul@kernel.org