dt-bindings: power: rpmpd: Add SAR2130P compatible

Document compatible for RPMh power domain controller on SAR2130P platform.

Signed-off-by: Dmitry Baryshkov <[e-mail]>
Acked-by: Krzysztof Kozlowski <[e-mail]>
Link: https://lore.kernel.org/r/[e-mail]
Signed-off-by: Ulf Hansson <[e-mail]>

Documentation/devicetree/bindings/power/qcom,rpmpd.yaml

···
           - qcom,sa8155p-rpmhpd
           - qcom,sa8540p-rpmhpd
           - qcom,sa8775p-rpmhpd
+          - qcom,sar2130p-rpmhpd
           - qcom,sc7180-rpmhpd
           - qcom,sc7280-rpmhpd
           - qcom,sc8180x-rpmhpd