Trailing whitespace

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

branches: 1.8.52;
#include <sys/bus.h> instead of <machine/bus.h>.

Drop 3rd and 4th clauses from Ichiro FUKUHARA's license.
Reviewed and approved by ichiro@ (copyright holder).

branches: 1.6.68;
Tab Police.

branches: 1.5.4; 1.5.6; 1.5.8; 1.5.10; 1.5.12;
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!

branches: 1.4.2; 1.4.8;
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.

branches: 1.3.4; 1.3.10; 1.3.12;
- Remove ixpsip_bs_tag (ixp425_sip_io.c). It just duplicated some of
the functionality of ixp425_bs_tag.
- Add missing stream_{read,write}_1 ops to ixp425_bs_tag.
- Re-work the delay() implementation to use the free-running Time-
Stamp counter. This removes the need to bootstrap TMR0 early on.

Use pmap_enter() instead of pmap_kenter_pa() as the former automatically
ensures the mapping is cache-inhibited, so we don't have to frob the PTE
directly.

pci bus support

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

branches: 1.8.52;
#include <sys/bus.h> instead of <machine/bus.h>.

Drop 3rd and 4th clauses from Ichiro FUKUHARA's license.
Reviewed and approved by ichiro@ (copyright holder).

branches: 1.6.68;
Tab Police.

branches: 1.5.4; 1.5.6; 1.5.8; 1.5.10; 1.5.12;
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!

branches: 1.4.2; 1.4.8;
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.

branches: 1.3.4; 1.3.10; 1.3.12;
- Remove ixpsip_bs_tag (ixp425_sip_io.c). It just duplicated some of
the functionality of ixp425_bs_tag.
- Add missing stream_{read,write}_1 ops to ixp425_bs_tag.
- Re-work the delay() implementation to use the free-running Time-
Stamp counter. This removes the need to bootstrap TMR0 early on.

Use pmap_enter() instead of pmap_kenter_pa() as the former automatically
ensures the mapping is cache-inhibited, so we don't have to frob the PTE
directly.

pci bus support