pciutils: Add decode support for RCECs

Root Complex Event Collectors provide support for terminating error
and PME messages from RCiEPs.  This patch provides basic decoding for
the lspci RCEC Endpoint Association Extended Capability. See PCIe 5.0-1,
sec 7.9.10 for further details.

Suggested-by: Bjorn Helgaas <bhelgaas@google.com>
Signed-off-by: Sean V Kelley <sean.v.kelley@linux.intel.com>
4 files changed