x86/CPU/AMD: Derive CPU topology from CPUID function 0xB when available

x86/CPU/AMD: Derive CPU topology from CPUID function 0xB when available

Derive topology information from Extended Topology Enumeration (CPUID
function 0xB) when the information is available.

Signed-off-by: Suravee Suthikulpanit <suravee.suthikulpanit@amd.com>
Signed-off-by: Borislav Petkov <bp@suse.de>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Link: http://lkml.kernel.org/r/1524865681-112110-3-git-send-email-suravee.suthikulpanit@amd.com
CVE-2018-3620
CVE-2018-3646

(cherry picked from commit 3986a0a805e668a63fac0ca2cdfa8db951f87c4b)
Signed-off-by: Tyler Hicks <tyhicks@canonical.com>
Signed-off-by: Stefan Bader <stefan.bader@canonical.com>