Remove trailing spaces and TAB.

luna68k: add psgpam(4) audio for LUNA, using YM2149 PSG/SSG sound chip.

"PSG PAM" is a audio driver using "Pulse Amplitude Modulation" with the
YM2149 PSG/SSG chip connected to the I/O processor HD647180X on LUNA.
The driver plays up to 30 kHz PCM audio by manipulating PSG channel volumes
at extremely high speed with 6.144 MHz HD647180X, a Z80 compatible sub CPU.
https://www.youtube.com/watch?v=fR7PqaLpijQ
https://www.youtube.com/watch?v=kCDZCgkwgBA

Compatibilities with the existing XPIOCDOWNLD ioctl(2) to download and
exec user programs (PSG sound driver player ported from PC-6001 etc.)
on the HD647180X is still provided.
https://twitter.com/tsutsuii/status/1533247362965315584

This psgpam(4) driver for NetBSD/luna68k was written by @moveccr
during isaki-audio2 branch developments, and it was also demonstrated
at Open Source Conference 2018 Kyoto:
https://github.com/isaki68k/netbsd-src/tree/audio2
https://mail-index.netbsd.org/netbsd-advocacy/2018/08/07/msg000781.html
https://twitter.com/tsutsuii/status/1025504875625365505

Note specifications of interrupts from the HD647180X to the host LUNA
was confirmed by Kenji Aoyama on his LUNA-88K2 running OpenBSD/luna88k.

I would like to thank all people still working on ancient LUNA machines!

mark nsmb major obsolete

Systematize handling of removed drivers.

- Every driver that was removed and whose number hasn't already been
reused is now listed with a commented-out "obsolete" line.
- The format of these has been systematized. Future format changes can
probably be safely done with a script.
- This does not include a few cases of assignments that only lasted a
couple days, or stuff from before major reorgs. Some of these may
be included nonetheless, because there was a lot of ground to cover
and therefore not a lot of time to dig into history in detail.

Note that the obsolete listings do not mean the major numbers can
never be reused; that's up to portmasters and/or core. It does mean
that they won't be reused by accident, however, which in some cases
(depending on the driver, how widely used it was, its family of device
nodes, their default permissions, etc.) can be quite dangerous.

Note that some of the things now explicitly listed as obsolete are
really ancient history. My scan went back as far as when the majors
files were added. (But not before that.)

branches: 1.22.14;
Add a driver for LUNA's front panel LCD. Ported from OpenBSD/luna88k.

Reviewed by enami@. Tested by Naruaki Etomi and me.

A 68k LUNA with this driver will be demonstrated at AsiaBSDCon NetBSD booth
by Etomi-san, with LUNA-88K2 running OpenBSD/luna88k by Kenji Aoyama.

branches: 1.21.2;
Preliminary support for LUNA's HD647180X I/O processor (a.k.a. XP).

Demonstrated as "PSG tunes / PCM wav player on LUNA"
(using Z80 PSG/PCM drivers ported from NEC PC-6001)
at OSC2016 Kyoto and OSC2016 Hiroshima:
http://mail-index.netbsd.org/netbsd-advocacy/2016/08/01/msg000712.html
http://mail-index.netbsd.org/netbsd-advocacy/2016/11/29/msg000724.html

branches: 1.20.12; 1.20.28; 1.20.30; 1.20.34; 1.20.36;
dependant -> dependent

Remove LKMs and switch to the module framework, pass 1.

Proposed on tech-kern@.

branches: 1.18.6; 1.18.10; 1.18.16; 1.18.18;
Remove systrace. Ok core@.

branches: 1.17.28; 1.17.34; 1.17.42;
s/independant/independent/, from Zafer.

branches: 1.16.20; 1.16.22;
merge ktrace-lwp.

make VMSWAP optional again.

revert "defflag VMSWAP" changes for now.
there seems to be far more people who don't want to edit
their kernel config files than i thought.

defflag VMSWAP.

branches: 1.12.2;
assign major for nsmb(4)

Change reference at bottom from sys/dev/majors to sys/conf/majors to match
reality

add wsfont major to archs which have the other wscons devices

reassing majors for crypto and pf to use the newly defined MI major
range

update the comment - the space for machine-dependant majors
is reduced to 0-143
follows discussion on tech-kern

Add some framework for MI assignment of device majors - add sys/dev/majors
which is automatically included during kernel config, and add comments
to individual machine-dependant majors.* files to assign new MI majors
in MI file.

Range 0-191 is reserved for machine-specific assignments, range
192+ are MI assignments.

Follows recent discussion on tech-kern@

create /dev/crypto

reserve cdev major # for PF. ok'ed by technical-exec

branches: 1.4.2;
Add ksyms device major.

branches: 1.3.2;
assign majors for raw and cooked cgd's.

branches: 1.2.2;
Merge the gehenna-devsw branch into the trunk.

This merge changes the device switch tables from static array to
dynamically generated by config(8).

- All device switches is defined as a constant structure in device drivers.

- The new grammer ``device-major'' is introduced to ``files''.

device-major <prefix> char <num> [block <num>] [<rules>]

- All device major numbers must be listed up in port dependent majors.<arch>
by using this grammer.

- Added the new naming convention.
The name of the device switch must be <prefix>_[bc]devsw for auto-generation
of device switch tables.

- The backward compatibility of loading block/character device
switch by LKM framework is broken. This is necessary to convert
from block/character device major to device name in runtime and vice versa.

- The restriction to assign device major by LKM is completely removed.
We don't need to reserve LKM entries for dynamic loading of device switch.

- In compile time, device major numbers list is packed into the kernel and
the LKM framework will refer it to assign device major number dynamically.

branches: 1.1.2;
file majors.luna68k was initially added on branch gehenna-devsw.