CVE-2026-80917 PCI: host-generic: Fix NULL pointer dereference on 32-bit CAM systems

In the Linux kernel, the following vulnerability has been resolved: PCI: host-generic: Fix NULL pointer dereference on 32-bit CAM systems On 32-bit systems the config space is too large to ioremap in one go, so pciecamcreate maps each bus segment separately and relies on the -addbus callback...