CVE-2026-97494 drm/amdgpu: validate and share PSP fw_pri_buf copies via psp_copy_fw

In the Linux kernel, the following vulnerability has been resolved: drm/amdgpu: validate and share PSP fwpribuf copies via pspcopyfw Change pspcopyfw from void to int: return -ENODEV when drmdeventer fails, and -EINVAL when the image size is zero or larger than the 1 MiB PSP private buffer. Repla...