virtio-bindings: add virtio-gpu bindings

[alyssais]

Signed-off-by: Alyssa Ross alyssa.ross@unikie.com

Summary of the PR

Requirements

Before submitting your PR, please make sure you addressed the following requirements:

• [x] All commits in this PR are signed (with git commit -s), and the commit message has max 60 characters for the summary and max 75 characters for each description line.
• [x] All added/changed functionality has a corresponding unit/integration test.
• [ ] All added/changed public-facing functionality has entries in the "Upcoming Release" section of CHANGELOG.md (if no such section exists, please create one).
• [x] Any newly added unsafe code is properly documented.

No changelog entry yet, since I would want to include all the other changes I've made to virtio-bindings at the same time (the PR template didn't ask about changelogs when I made those changes), and maybe discuss what the next version should be called. I'll put together a complete changelog when I have a chance.

[lauralt]

No changelog entry yet, since I would want to include all the other changes I've made to virtio-bindings at the same time (the PR template didn't ask about changelogs when I made those changes), and maybe discuss what the next version should be called. I'll put together a complete changelog when I have a chance.

Yes, we missed starting updating the changelog for 0.2.0 in this PR. Thank you!

[lauralt]

@alyssais we can merge this as it is, feel free to open a separate PR for the changelog if you have time, if not we will fix the changelog anyway when we do a new release.