sys: Remove $FreeBSD$: two-line .h pattern

Remove /^\s*\*\n \*\s+\$FreeBSD\$$\n/

Expose EFI wake time API

Reviewed by: kib
MFC after: 1 week
Differential revision: https://reviews.freebsd.org/D36714

EFI RT: resurrect EFIIOC_GET_TABLE

Make it work, but change the interface to be safe for non-root users. In
particular, right now interface only works for the tables which can be
minimally parsed by kernel to determine the table size. Then, userspace can
query the table size, after that it provides a buffer of needed size
and kernel copies out just table to userspace.

Main advantage is that user no longer need to be able to read /dev/mem,
the disadvantage is the need to have minimal parsers aware of the table
types. Right now the parsers are implemented for ESRT and PROP tables.

Future extension of the present interface might be a return of only
the table physical address, in case kernel does not have suitable
parser yet. Then, a privileged user could read the table from /dev/mem.
This extension, which logically equivalent to the old (non-worked)
EFIIOC_GET_TABLE variant, is not implemented until needed.

Submitted by: Pavel Balaev <pavel.balaev@3mdeb.com>
MFC after: 2 weeks
Differential revision: https://reviews.freebsd.org/D30104

efidev: remove EFIIOC_GET_TABLE ioctl

This ioctl would instantly induce a panic, likely since near inception, up
until 0861c7d3e048. Lack of previous interest in fixing it combined with
the problematic interface (exports a pointer, really a physical address)
brings us to the natural conclusion: remove it until a useful consumer
forward.

If it eventually gets resurrected, the interface should definitely not
return in this exact form and likely needs to be reimagined.

The associated KPI, efi_get_table, is left intact for the time being.

Reviewed by: imp, jrtc27
Also discussed with: brooks, jhb
Differential Revision: https://reviews.freebsd.org/D28030

Regularize the Netflix copyright

Use recent best practices for Copyright form at the top of
the license:
1. Remove all the All Rights Reserved clauses on our stuff. Where we
piggybacked others, use a separate line to make things clear.
2. Use "Netflix, Inc." everywhere.
3. Use a single line for the copyright for grep friendliness.
4. Use date ranges in all places for our stuff.

Approved by: Netflix Legal (who gave me the form), adrian@ (pmc files)

Create /dev/efidev to provide an ioctl interface to
userland. It supports userland interfaces to UEFI Runtime Services. This is
indended to the the MI portion of EFI RuntimeServices support.

Differential Revision: https://reviews.freebsd.org/D8128
Reviewed by: kib@, wblock@, Ganael Laplanche