CVE-2026-92492 cpufreq/amd-pstate: handle missing policy in dynamic EPP callbacks

In the Linux kernel, the following vulnerability has been resolved: cpufreq/amd-pstate: handle missing policy in dynamic EPP callbacks cpufreqcpuget returns NULL when no cpufreq policy is associated with the requested CPU, for example because the CPU is offline or the policy has already been torn...