x86: add cpu_get_pkg_id() and cpu_get_core_id() topology helpers

[afscoelho_gmail.com]

Summary

Map logical CPU to physical package (socket) id and physical core id by
shifting per-package and SMT-thread bits out of the APIC id. SMT siblings
share a core id.

Lets drivers for per-socket or per-core hardware bind to real topology,
not NUMA domains or logical CPUs. First consumer: AMD RAPL (package
energy MSRs socket-scoped, per-core energy MSR shared by SMT siblings).

Sponsored by: Advanced Micro Devices (AMD)
MFC after: 2 weeks
Signed-off-by: Andre Silva <[e-mail]>

[afscoelho_gmail.com]

Correct stack onto D55603 and add Co-authored-by trailer for ShengYi Hung.