pmc.amd(3): rename from pmc.k8(3)

This is the first step in recognizing that the K8 microarchitecture
represents a small and aged subset of AMD CPUs supported by this class.
Future changes will update the code and documentation details to better
reflect this.

Keep the old filename as an alias.

Reviewed by: jkoshy
MFC after: 1 week
Sponsored by: The FreeBSD Foundation
Differential Revision: https://reviews.freebsd.org/D41279

pmc: remove last bits of AMD K7 CPU support

This includes event definitions from sys/pmc_events.h, definitions from
sys/pmc.h, and the man pages.

Reviewed by: jkoshy
Sponsored by: The FreeBSD Foundation
Differential Revision: https://reviews.freebsd.org/D41275

Remove $FreeBSD$: two-line nroff pattern

Remove /^\.\\"\n\.\\"\s*\$FreeBSD\$$\n/

pmc(3): remove Pentium-related man pages and references

Support for Pentium events was removed completely in e92a1350b50e.

Don't bump .Dd where we are just removing xrefs.

Reviewed by: emaste
MFC after: 1 week
Sponsored by: The FreeBSD Foundation
Differential Revision: https://reviews.freebsd.org/D31423

pmc(3): mandoc clean ups

- new sentence, new line
- tab in filled text
- unusual Xr order
- skipping paragraph macro: Pp before Ss

Reviewed by: bcr
MFC after: 1 week
Differential Revision: https://reviews.freebsd.org/D31143

use .Mt to mark up email addresses consistently (part3)

PR: 191174
Submitted by: Franco Fichtner <franco at lastsummer.de>

Remove EOL whitespace.

Update hwpmc to support Haswell class processors.
0x3C: /* Per Intel document 325462-045US 01/2013. */

Add manpage to document all the goodness that is available in this
processor model.

Submitted by: hiren panchasara <hiren.panchasara@gmail.com>
Reviewed by: jimharris, sbruno
Obtained from: Yahoo! Inc.
MFC after: 2 weeks