dt-bindings: power: qcom,rpmpd: Add SM4450 compatible

Document compatible for RPMh power domain controller on SM4450 Platform.

Signed-off-by: Ajit Pandey <quic_ajipan@quicinc.com>
Acked-by: Rob Herring (Arm) <robh@kernel.org>
Link: https://lore.kernel.org/r/20250417-sm4450_rpmhpd-v1-1-361846750d3a@quicinc.com


Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>