virtio-bindings: regenerate with Linux 6.4

[alyssais]

Summary of the PR

Still on bindgen 0.63.0, because newer versions generate exactly the same thing.

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.
• [ ] All added/changed functionality has a corresponding unit/integration test.
• [x] 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.

[Ablu]

Ah... Just realized that I did the same in https://github.com/rust-vmm/vm-virtio/pull/255. I am happy to rebase that one and drop the commit from my PR. But I fear this needs a rebase with the CHANGELOG.md having changed.