iaxwifi200 & idualwifi7265: Port a fix from OpenBSD.

iaxwifi200 & idualwifi7260: Synchronize with OpenBSD.

idualwifi7260: Synchronize with OpenBSD.

idualwifi7260 & iaxwifi200: Synchronize with OpenBSD.

openbsd_network & drivers: Implement the real bus_dmamem functions.

This required the addition of some slight modifications to the main
(FreeBSD compat) bus_dma implementation.

Allows some #ifdefs from iaxwifi/idualwifi to be dropped, and will
ease the porting of some future drivers.

Tested with idualwifi7260, seems to work as before.

openbsd_network: Move ifq_*_oactive wrappers to a common header.

openbsd_network: Add a real implementation of MCLGETL.

The old alias had a number of shortcomings which made it not match
OpenBSD and thus special-casing had to be used in drivers. The new
version should match OpenBSD's semantics precisely.

idualwifi & iaxwifi: Merge changes from OpenBSD.

OpenBSD wlan drivers: We cannot back out of initialization at preinit.

Otherwise we get KDLs. Fixes #17811.

idualwifi7260: Merge patch from OpenBSD for some 9xxx devices.

idualwifi7260 & iaxwifi200: Enable PCI busmastering.

The FreeBSD KPIs that we emulate expect this to be done manually,
so we have to do it before we begin doing PCI access.

Fixes firmware load failures and device initialization problems
since the introduction of the OpenBSD driver replacing the FreeBSD one.

idualwifi7260 & iaxwifi200: Do not return but go to the appropriate fail.

This way, we will actually tear down what state got initialized.

idualwifi7260 & iaxwifi200: preinit() can fail.

This will prevent the device from even appearing in Network preferences
if firmware loading does not work.

idualwifi7260 & iaxwifi200: Use the Haiku gDriverName instead of hardcoding.

This also will fix what name appears in the syslog.

freebsd_network: Always hold the "Giant" lock during attaches.

Reduces patches to OpenBSD drivers slightly, and could potentially
help with some of the KDLs.

idualwifi7260: Add error to panic message.

Should help with diagnosing the KDLs seen in #14298.

idualwifi7260 & iaxwifi200: Adaptations for FreeBSD/Haiku support.

Mostly a few #ifdefs for the dmamem API, if_alloc, probe, and attach hooks.
Basically the same changes in both drivers.

The firmware name map is not really needed anymore; the OpenBSD drivers
have unique firmware names and do not generally use ".ucode" extensions.
So just use the filenames as-is and drop the map.

idualwifi7260: Delete FreeBSD driver, import OpenBSD driver.

Again not wired into the build, nor yet modified in any way.