dt-bindings: drm: bridge: adi,adv7511.txt: convert to yaml

Convert the ADV7511/11w/13/33/35 DT bindings to json-schema. The
original binding has been split into two files: adi,adv7511.yaml for
ADV7511/11W/13 and adi,adv7533.yaml for ADV7533/35.

Signed-off-by: Ricardo Cañuelo <ricardo.canuelo@collabora.com>
Reviewed-by: Rob Herring <robh@kernel.org>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Rob Herring <robh@kernel.org>
Link: https://lore.kernel.org/r/20210615131333.2272473-4-ricardo.canuelo@collabora.com