net/wifi-firmware-mt7601u-kmod: bump version

In order to keep all wifi-firmware ports on the same level, bump
the version here;  the underlying firmware file has not changed
since it was added in 2023 so we are save.

Sponsored by:	The FreeBSD Foundation
Reviewed by:	jrm
Differential Revision: https://reviews.freebsd.org/D54205

net/wifi-firmware-kmod: allow ONLY_FOR_ARCHS to be set by child ports

mtw(4) is built along USB for all architectures so we need firmware
on all architectures -- unlike the LinuxKPI based wireless drivers
which are restricted by default.

Allow ONLY_FOR_ARCHS to be set in a child port; maintaing a full list
of supported ARCHes seems unreasonable though so allow NOT_FOR_ARCHS
to disable the ONLY_FOR_ARCHS logic in Makefile.inc.  That way
wifi-firmware-mt7601u-kmod can define an empty NOT_FOR_ARCHS and
it should build on all ARCHes.

Sponsored by:	The FreeBSD Foundation
Reviewed by:	jrm
Differential Revision: https://reviews.freebsd.org/D53788

net/wifi-firmware-{iwlwifi,*}-kmod: add missing firmware files

The firmware files for iwlwifi were lacking entries for some older
driver versions on 14.2-RELEASE and stable/14 [1] before
src:f4e352ef16d6.

In addition iwx(4) switched to using the same firmware file names
as iwlwifi so that fwget(8) would work for both of them (D49259).
We add the set of iwx(4) firmware files hard coded to the list of
files.

Given the list of supported revisions will grow and maintaining them
for all branches will be tedious without overlap we will simply create
the lists and let make do the job of :O:u (sort/uniq) in the common
Makefile.inc to filter out duplicates between branches.

net/wifi-firmware-mtw-kmod: Rename to net/wifi-firmware-mt7601u-kmod

Fixes also the flavor part, so that the specific pkg includes
the binary firmware
Reviewed by:	bz
Differential Revision:	https://reviews.freebsd.org/D48944