[Feature Request] turnip: Support of Gamescope

Looks like it's not possible to run gamescope due to lack of VK_EXT_physical_device_drm support.

It would be nice to have it as FSR is already working (I tested it in Crysis with Proton 7.0rc6 GE on box86) and it give nice boost to performance in games that struggle in higher resolutions. Working upscaling option for linux games on phones would be nice as upscaling is hard to see on this small screens.

EDIT: As @zzoon written, Gamescope didn't work after adding just VK_EXT_physical_device_drm so I changed title to appropriate one for clearance.