dt-bindings: drm/msm/gpu: convert to YAML

Conversion of text binding for Adreno GPU to the YAML format.

Signed-off-by: David Heidelberg <david@ixit.cz>
Reviewed-by: Rob Herring <robh@kernel.org>
Link: https://lore.kernel.org/r/20211017144350.70295-1-david@ixit.cz


Signed-off-by: Rob Clark <robdclark@chromium.org>