CVE-2026-90047 drm/xe: Don't hand out the flat CCS storage as usable VRAM

In the Linux kernel, the following vulnerability has been resolved: drm/xe: Don't hand out the flat CCS storage as usable VRAM getflatccsoffset reads the base of the flat CCS storage from the hardware, scales it by the number of enabled L3 nodes, and rounds the result up to 128K. Everything below...