sys: Fix various abuse of struct device internals.

Will help to make struct device opaque later.

Split softc/device_t, with misc cosmetic changes.

branches: 1.12.40; 1.12.44; 1.12.46; 1.12.48;
Kill caddr_t; there will be some MI fallout, but it will be fixed shortly.

branches: 1.11.4;
Make sun3 use common sun68k/sun68k/isr.c, sun68k/include/cpu.h and
sun68k/include/intr.h.

This also means now sun3 has GENERIC_SOFT_INTERRUPTS support,
so also adapt fd.c and zs.c to MI softintr(9) APIs.

(I'll also update related sources in yamt-splraiseipl branch later)

branches: 1.10.20; 1.10.22;
merge ktrace-lwp.

branches: 1.9.8;
de-__P, remove register, ansify, b* -> mem*, u_int*_t -> uint*_t.

branches: 1.8.8;
Move UCB-licensed code from 4-clause to 3-clause licence.

Patches provided by Joel Baker in PR 22364, verified by myself.

branches: 1.7.6;
merge kqueue branch into -current

kqueue provides a stateful and efficient event notification framework
currently supported events include socket, file, directory, fifo,
pipe, tty and device changes, and monitoring of processes and signals

kqueue is supported by all writable filesystems in NetBSD tree
(with exception of Coda) and all device drivers supporting poll(2)

based on work done by Jonathan Lemon for FreeBSD
initial NetBSD port done by Luke Mewburn and Jason Thorpe

branches: 1.6.2; 1.6.4; 1.6.8;
Change the kernel mmap interface so that the offset to map is an
"off_t" and the return value is a "paddr_t" to allow mappings
at offsets past 2^31 bytes. Somewhat inspired by FreeBSD, which
only changed the offset to a "vm_offset_t".

Includes updates for the i386, pc532 and sh3 mmmmap from Jason Thorpe.

branches: 1.5.14; 1.5.24;
Add fb_eeprom_setsize() for setting the FB size based on the EEPROM
value (to be used only if unit=0). Add P4 helper functions:
fb_pfour_id, fb_pfour_setsize, fb_pfour_{get,set}_video

Make this compile with -Werror -Wall -Wstrict-prototypes
(finally! yea!) Also get rid of __BROKEN_INDIRECT_CONFIG

Fix typo (fbattach => fb_attach)

Changed fb_attach() interface

New frame-buffer support from Chuck Silvers (plus some tweaks from me)