dt-bindings: soc: qcom: convert non-smd RPM bindings to dt-schema

Convert the non-SMD RPM node bindings to dt-schema, the old txt bindings
are now removed since all bindings were converted.

Signed-off-by: Neil Armstrong <neil.armstrong@linaro.org>
Reviewed-by: Rob Herring <robh@kernel.org>
Acked-by: Lee Jones <lee@kernel.org>
Signed-off-by: Bjorn Andersson <andersson@kernel.org>
Link: https://lore.kernel.org/r/20221005-mdm9615-pinctrl-yaml-v5-2-910019fb8b9b@linaro.org