Changes

x86: abstract out the function to use Intel's Extended Topology
Enumeration
What we enable when the x2apic cpu feature is supported.
Signed-off-by: Brice Goglin <Brice.Goglin@inria.fr>
(cherry picked from commit 4236f666ae6f481bc4c1a3370a682062ec9958ad)

x86: enable v2 Extended Topology Enumeration support
The code is identical to the former non-v2 but the CPUID leaf is
different and more levels are coming.
Signed-off-by: Brice Goglin <Brice.Goglin@inria.fr>
(cherry picked from commit 479f02b1146a2012095af7455ee75d7be11a43b5)

x86: add support for Die levels in v2 Extended Topology Enumeration
We make them Groups for now.
Signed-off-by: Brice Goglin <Brice.Goglin@inria.fr>
(partially cherry picked from commit
1da40c576a14e5028309a20b75857ac61ea78618)