dt-bindings: remoteproc: qcom: Add sm6115 pas yaml file

This documents the aDSP, cDSP and MPSS DSPs present
on the SM6115 SoC.

Signed-off-by: Bhupesh Sharma <bhupesh.sharma@linaro.org>
Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Signed-off-by: Bjorn Andersson <andersson@kernel.org>
Link: https://lore.kernel.org/r/20230128053504.2099620-2-bhupesh.sharma@linaro.org