CVE-2026-53315 drm/amd/ras: Fix NULL deref in ras_core_get_utc_second_timestamp()

In the Linux kernel, the following vulnerability has been resolved: drm/amd/ras: Fix NULL deref in rascoregetutcsecondtimestamp rascoregetutcsecondtimestamp retrieves the current UTC timestamp in seconds since the Unix epoch through a platform-specific RAS system callback and is used for...