dt-bindings: remoteproc: qcom: Convert wcnss documentation to YAML

This is a direct conversion of the existing txt documentation to YAML.
It is in preparation for the addition of pronto-v3 to the docs. This
patch doesn't document any of the existing subnodes/properties that are
not documented in the existing txt file. That is done in a separate
patch.

Signed-off-by: Sireesh Kodali <sireeshkodali1@gmail.com>
Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Signed-off-by: Bjorn Andersson <andersson@kernel.org>
Link: https://lore.kernel.org/r/20221001031345.31293-3-sireeshkodali1@gmail.com