dt-bindings: misc: fastrpc convert bindings to yaml

Convert Qualcomm FastRPC bindings to yaml format, so that we could validate
dt-entries correctly and any future additions can go into yaml format.

Use compute-cb@ subnodes instead of just cb@. Add qcom,glink-channels and
qcom,smd-channels missing properties to make sure dtbs_check doesn't fail
right off the bat. Correct the name of the parent node in the example from
smd-edge to glink-edge.

Since now the qcom,fastrpc bindings document is yaml, update the
reference to it in qcom,glink-edge and also use $ref.

Also update the MAINTAINERS file to point to the yaml version.

Co-developed-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org>
Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org>
Co-developed-by: David Heidelberg <david@ixit.cz>
Signed-off-by: David Heidelberg <david@ixit.cz>
Signed-off-by: Abel Vesa <abel.vesa@linaro.org>
Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Link: https://lore.kernel.org/r/20220907074301.3996021-1-abel.vesa@linaro.org


Signed-off-by: Rob Herring <robh@kernel.org>