soc: qcom: rpmpd: Add SM6375 support

Add support for RPMPDs on SM6375.

Signed-off-by: Konrad Dybcio <konrad.dybcio@somainline.org>
Signed-off-by: Bjorn Andersson <andersson@kernel.org>
Link: https://lore.kernel.org/r/20220716193201.455728-2-konrad.dybcio@somainline.org