dt-bindings: soc: qcom: smd-rpm: Convert binding to YAML schema

Convert the qcom,smd-rpm.txt document to YAML schema

Reviewed-by: Rob Herring <robh@kernel.org>
Signed-off-by: Kathiravan T <kathirav@codeaurora.org>
Link: https://lore.kernel.org/r/1595225543-12127-4-git-send-email-kathirav@codeaurora.org


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