pkg/57559: Move efivar port from pkgsrc-wip to pkgsrc

[sergii.dmytruk%3mdeb.com@localhost]

>Number:         57559
>Category:       pkg
>Synopsis:       Move efivar port from pkgsrc-wip to pkgsrc
>Confidential:   no
>Severity:       non-critical
>Priority:       medium
>Responsible:    pkg-manager
>State:          open
>Class:          change-request
>Submitter-Id:   net
>Arrival-Date:   Thu Aug 03 21:25:00 +0000 2023
>Originator:     Sergii Dmytruk
>Release:        
>Organization:
3mdeb Sp. z o.o.
>Environment:
>Description:
This is second instantiation of PR#57076 which turned into an PR about
EFI/ESRT and related patches.  That one was just closed after pulling
the changes into netbsd-10 and I chose to create another PR about
the package to not put too much into that thread.

efivar requires EFI functionality that's not available in 9.x, so maybe
you can't move the package until NetBSD 10 is out, but then we still want
to track this somehow.

Relevant copy of the original description:

3mdeb made a port of efivar [1] for *BSD systems [2], which is a
dependency of fwupd project [3].  We want to upstream efivar as
a prerequisite for adding fwupd later.

[1]: https://github.com/rhboot/efivar
[2]: https://github.com/3mdeb/efivar/blob/bsd/BSD_PORTING.md
[3]: https://fwupd.org/

It's in pkgsrc-wip repo [4] at the moment.

[4]: https://github.com/NetBSD/pkgsrc-wip/tree/master/efivar
>How-To-Repeat:

>Fix: