dt-bindings: soc: qcom: smd-rpm: Add SM6115 compatible

Add the dt-binding for the rpm on the Qualcomm SM4250/6115 SoC platform.

Signed-off-by: Iskren Chernev <iskren.chernev@gmail.com>
Acked-by: Rob Herring <robh@kernel.org>
Link: https://lore.kernel.org/r/20210627185927.695411-2-iskren.chernev@gmail.com


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