dt-bindings: remoteproc: qcom: Convert SC7180 MSS bindings to YAML

Add a separate YAML binding to act as a superset of the PAS and non-PAS
compatible for SC7180 MSS PIL. This also serves as a way to increase
readability.

Signed-off-by: Sibi Sankar <quic_sibis@quicinc.com>
Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
Link: https://lore.kernel.org/r/1657020721-24939-3-git-send-email-quic_sibis@quicinc.com