mainline inclusion
from mainline-v5.11-rc1
commit 1dc2da5c
category: feature
bugzilla: https://gitee.com/openeuler/intel-kernel/issues/I596K9
CVE: NA

Intel-SIG: commit 1dc2da5c PCI: Add defines for Designated Vendor-Specific
Extended Capability.
Backport for intel PMT (Platform Monitoring Technology) support
--------------------------------

Add PCIe Designated Vendor-Specific Extended Capability (DVSEC) and defines
for the header offsets. Defined in PCIe r5.0, sec 7.9.6.
Signed-off-by: NDavid E. Box <david.e.box@linux.intel.com>
Acked-by: NBjorn Helgaas <bhelgaas@google.com>
Reviewed-by: NAndy Shevchenko <andy.shevchenko@gmail.com>
Signed-off-by: NLee Jones <lee.jones@linaro.org>
Signed-off-by: Nyingbao jia <yingbao.jia@intel.com>
Signed-off-by: NJun Tian <jun.j.tian@intel.com>