provide __HAVE_COMPAT_NETBSD32 and fix multiple include protection consistently.

Make all ports use a common disklabel.h with MAXPARTITIONS set to 16.
Only RAW_PART varies between ports.

branches: 1.14.8; 1.14.18;
Bump MAXPARTITIONS from 8 to 16 using __HAVE_OLD_DISKLABEL compat method
as i386 and hpcmips. PR port-hpcarm/18256

branches: 1.13.10; 1.13.30; 1.13.32;
Now that __HAVE_TIMECOUNTER and __HAVE_GENERIC_TODR are invariants,
remove the conditionals and the code associated with the undef case.

branches: 1.12.2; 1.12.8;
Merge the ppcoea-renovation branch to HEAD.

This branch was a major cleanup and rototill of many of the various OEA
cpu based PPC ports that focused on sharing as much code as possible
between the various ports to eliminate near-identical copies of files in
every tree. Additionally there is a new PIC system that unifies the
interface to interrupt code for all different OEA ppc arches. The work
for this branch was done by a variety of people, too long to list here.

TODO:
bebox still needs work to complete the transition to -renovation.
ofppc still needs a bunch of work, which I will be looking at.
ev64260 still needs to be renovated
amigappc was not attempted.

NOTES:
pmppc was removed as an arch, and moved to a evbppc target.

branches: 1.11.6; 1.11.10;
Generic soft interrupts are mandatory.

branches: 1.10.8; 1.10.16;
Enable MI todr(9) and timecounter on hpcarm.

branches: 1.9.2; 1.9.4;
Nothing in the kernel now tests __HAVE_NWSCONS, so stop defining it everywhere.

branches: 1.8.4; 1.8.8;
merge ktrace-lwp.

branches: 1.7.16;
add __GENERIC_SOFT_INTERRUPTS_ALL_LEVELS to machine/types.h for
following ports:

acorn26, amiga, hpcarm, sparc, sparc64

This was proposed by Martin Husemann at teck-kern@ in May to properly
test whether softintr can be established for all IPL, or only for
IPL_SOFT*. OKed by acorn26, hpcarm and sparc port masters.

branches: 1.6.16;
Use "#define<tab>".

Add 26-bit and 32-bit types.h files, which indicate the programming
model in use for a given platform (__PROG26 vs __PROG32), then pulls
in <arm/types.h>. Change each ARM port to pull in <arm/arm26/types.h>
or <arm/arm32/types.h> as appropriate. Change all references to PROG26
and PROG32 to __PROG26 and __PROG32. Eliminate the opt_progmode.h
header file.

branches: 1.4.2; 1.4.8;
Define __HAVE_GENERIC_SOFT_INTERRUPTS, and nuke traditional softserial and
softclock.

branches: 1.3.4;
__HAVE_NWSCONS and __HAVE_DEVICE_REGISTER are MACHINE-dependent.

Big patch for merging common include files of the new hpcarm tree and the old arm32
tree into the new arm substree. All moved files are relinked with a stub that included
the file from the new location; this might be done better later.

hpcarm:
kernel for StrongARM-based WinCE PDA machine.