dt-bindings: media: convert fsl-vdoa.txt to yaml format

Convert fsl-vdoa.txt to yaml format.

Additional changes:
- Add irq.h and imx6qdl-clock.h in example.

Signed-off-by: Frank Li <Frank.Li@nxp.com>
Reviewed-by: Rob Herring (Arm) <robh@kernel.org>
Signed-off-by: Nicolas Dufresne <nicolas.dufresne@collabora.com>
Signed-off-by: Hans Verkuil <hverkuil@xs4all.nl>