sys: Remove $FreeBSD$: one-line .c pattern

Remove /^[\s*]*__FBSDID\("\$FreeBSD\$"\);?\s*\n/

iwm: update if_iwmreg.h to the latest (as of today) openbsd changes

Summary:
This updates the if_iwmreg.h definitions to;

OpenBSD: if_iwmreg.h,v 1.65 2021/10/11 09:03:22 stsp Exp

A few things haven't been fully converted, namely:

* I left a couple things as enums for now just to reduce the
other diffs needed; but they're the same values

* The IWM_SCD_QUEUE_* macros have different offsets which I
didn't update in case they broke things / changed based on later
firmware. But they also may be real bugfixes which are needed
for later chips. It'll need more testing before flipping this on.

The c file updates are:

* Use the newer names for things if the name changed but the semantics
didn't
* Explicitly use the earlier firmware structs which maintain compat
with the current firmware and code. The newer ones are in here and
they'll get converted when more openbsd code is merged into this tree.
* Use the older iwm rate table for now, which has entries for legacy
rates, HT and VHT. Our code works with that right now, updating it
to openbsd's err, "different" version can be done at a later date
when HT/VHT support is added.

Notably, a bunch of definitions were deleted that weren't used.
They're not used either in the openbsd/dfbsd drivers so I think it's
safe to delete them in the long run.

Test Plan: 7260 hw 0x140

Subscribers: imp
Differential Revision: https://reviews.freebsd.org/D32627
Reviewed by: md5
Obtained From: OpenBSD

iwm - Reduce gratuitous differences with Linux iwlwifi in struct naming.

* Rename some structs and struct members for firmware handling.

Submitted by: Augustin Cavalier <waddlesplash@gmail.com> (Haiku)
Obtained from: DragonFlyBSD (4b1006a6e4d0f61d48c67b46e1f791e30837db67)

[iwm] Set command code for PHY_DB as well.

Obtained from: dragonflybsd.git 58318c956a74382d1286ccabaf767012fdcfe1a2

[iwm] include opt_iwm.h and opt_wlan.h consistently in all files.

[iwm] Change 2nd arg of iwm_phy_db_set_section() to struct iwm_rx_packet.

* This matches the function declaration in Linux's iwlwifi.

Obtained from: DragonflyBSD commit de7995a5e0ebf2d0016a87a0142a98c75db58fb4

[iwm] Sync if_iwm_phy_db code with Linux iwlwifi.

Obtained from: Dragonflybsd commit c1019b6bfff36c856f7b4fccbdf3bb13ac27750c

iwm(4) synchronize driver to DragonFlyBSD version and recent f/w update.

Submitted by: Kevin Bowling (kevin.bowling@kev009.com)
MFC after: 2 weeks
Differential Revision: https://reviews.freebsd.org/D6967

[iwm] Add and use iwm_phy_db_free(), to plug phy_db memory leak.

(Together with other iwm(4) memory leak fixes) Memory leakage in M_DEVBUF
is now at ca. 2KB for each iwm(4) module load/unload cycle.

Submitted by: Imre Vadasz <imre@vdsz.com>
Approved by: re (gjb)
Obtained from: DragonflyBSD git eaf551a1d464c643e98ce5781971dd32124e9af1
Differential Revision: https://reviews.freebsd.org/D6819

iwm: add 'opt_wlan.h' include into source files.

Include net80211 options file, so IEEE80211_DEBUG_REFCNT option will be
handled correctly.

iwm: use the proper include path for iwm headers.

Import OpenBSD's iwm WiFi driver for Intel 3160/7260/7265.

There are still several bugs, but I've been using it for a while now.
Thanks to all the testers and to Adrian for his help with this
driver.

This driver isn't connected to the build yet, but it will be soon.

There's no MFC planned because the driver isn't very stable yet.

Reviewed by: adrian
Obtained from: https://github.com/rpaulo/iwm
Tested by: adrian, gjb, dumbbell (others that I forgot).
Relnotes: yes