further de-cargocult the new mmap() methods

EINVAL (22) is a valid return value for ARM mmap routines; we need to
return -1 for invalid mmap attempts.

- support *_mmap()
- support BUS_SPACE_MAP_PREFETCHABLE for memory spaces
- fill in *_stream methods if needed
With this Xorg with wsfb works on iyonix. The nv driver still crashes ( and
needs option

- support *_mmap()
- support BUS_SPACE_MAP_PREFETCHABLE for memory spaces
- fill in *_stream methods if needed
With this Xorg with wsfb works on iyonix. The nv driver still crashes ( and
needs options INSECURE ), something seems to be wrong with accessing IO space.
But, progress.

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use designated initializer to make adaptability and flexibility for changing struct bus_space.
no functional change.

Skip a tautologic check if we know it is one.

#include <sys/bus.h> instead of <machine/bus.h>.

Typo in comment.

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 v

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.

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Implement ATU Direct Window in order to increase available PCI address
space.

bus_dmamem_map: honour BUS_DMA_NOWAIT. noted by Manuel Bouyer.
bus_space_map: always do NOWAIT allocation as it used to be before yamt-km.

we have too many copies!

merge yamt-km branch.
- don't use managed mappings/backing objects for wired memory allocations.
save some resources like pv_entry. also fix (most of) PR/27030.
- simplify kernel memory management

merge yamt-km branch.
- don't use managed mappings/backing objects for wired memory allocations.
save some resources like pv_entry. also fix (most of) PR/27030.
- simplify kernel memory management API.
- simplify pmap bootstrap of some ports.
- some related cleanups.

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Supply rr_1 and wr_1.

Make sure to pass mod/ref seeds with PMAP_WIRED.

__KERNEL_RCSID()

remove trailing \n in panic(). approved perry.

Use generic_bs_sr_4 for bus_space_set_region_4.

Use the bus_space_generic bus space ops.

Basic support for the Intel i80321 I/O Processor (Xscale core).

Note: This is a snapshot of work-in-progress; there are still some
bugs to be shaken out.