pciconf: Report topology information

[jfree]

Summary

Add the -t flag to show available topology information for queried
devices. Currently, only NUMA node is reported.

[jfree]

Update manual page .Dd date

[imp]

This looks good. There areno compat concerns

[jhb]

Oh, hmm, I would think of topology differently TBH. That is, my hope/expectation was to get a hierarchical view similar to one of the views you can get with lspci where you print the PCI devices as an indented hierarchy similar to the output from devinfo, where devices are children (and indented) under their parent PCI-PCI bridges, etc. We also tend to use "domain" instead of "node" for NUMA in general in prose descriptions.