arm64: dts: qcom: sm8450: add RPMH_REGULATOR_LEVEL_LOW_SVS_D1

Add another power saving state used on SM8450. Unfortunately adding it
in proper place causes renumbering of all the opp states in sm8450.dtsi

Reviewed-by: Konrad Dybcio <konrad.dybcio@somainline.org>
Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Signed-off-by: Bjorn Andersson <andersson@kernel.org>
Link: https://lore.kernel.org/r/20221207012803.114959-2-dmitry.baryshkov@linaro.org