From gentoo-dev ML: "We will be dropping all patches that are not upstream and are not obviously Gentoo-specific configuration changes. If you want your patch back in, you will _need_ to file it upstream and have it committed before we will re-add it." I guess that includes xbox video support.
I have filed a bug on freedesktop.org : https://bugs.freedesktop.org/show_bug.cgi?id=4221 Without this patch, it's useless to send the xbox driver upstream. The Linux PCI scanning is broken, actually all resource windows are calculated wrong. They are 1 byte to large.
marking as upstream then.