platform/x86/intel/pmt: Ignore uninitialized entries

mainline inclusion
from mainline-v6.4-rc1
commit 3f581602
category: feature
bugzilla: https://gitee.com/openeuler/intel-kernel/issues/I8WO3U
CVE: NA

Reference: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=3f581602a22cc5445a66501fa13a80894d83e42a



-------------------------------------

On Intel Xeon, unused PMT regions will have uninitialized discovery headers
containing all 0xF. Instead of returning an error, just skip the region.

Intel-SIG: commit 3f581602 platform/x86/intel/pmt: Ignore uninitialized entries.
Backport Intel_pmt to auxiliary bus and important bug fix.

Signed-off-by: David E. Box <david.e.box@linux.intel.com>
Reviewed-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>
Link: https://lore.kernel.org/r/20230413012922.1521377-1-david.e.box@linux.intel.com


Signed-off-by: Hans de Goede <hdegoede@redhat.com>
[ Yingbao Jia: amend commit log ]
Signed-off-by: Yingbao Jia <yingbao.jia@intel.com>