dt-bindings: power: rpmpd: Add SM6115 to rpmpd binding

Add compatible and constants for the power domains exposed by the RPM
in the Qualcomm SM4250/6115 platforms.

Signed-off-by: Iskren Chernev <iskren.chernev@gmail.com>
Acked-by: Rob Herring <robh@kernel.org>
Link: https://lore.kernel.org/r/20210627185927.695411-5-iskren.chernev@gmail.com


Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>