userland needs to see PCI_MAGIC_IO_RANGE

Cleanup powerpc param.h. If compiling a MODULE, ignore port-specific stuff.
Only include <machine/cpu.h> in <powerpc/param.h> at the end.

Define PCI_MAGIC_IO_RANGE for X11 server. The address chosen may change.
Approved by garbled.

just set MACHINE and include powerpc/param.h - non-NEWPMAP ofppc kernels boot now.

use _KERNEL_OPT

raise MSIZE from 128 to 256.
- for sizeof(void *) == 8 arch, this is mandatory. MHLEN is too small
already (less than 80) and there are chances for unwanted packet loss due
to m_pullup restricti

raise MSIZE from 128 to 256.
- for sizeof(void *) == 8 arch, this is mandatory. MHLEN is too small
already (less than 80) and there are chances for unwanted packet loss due
to m_pullup restriction.
- for other cases, the change should avoid allocating clusters in most cases
(even when you have IPv4 IPsec tunnel, or IPv6 with moderate amount of
extension header)

portmasters: if your arch chokes with the change (high memory usage or
whatever), please backout the change for your arch.

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Update for the NKMEMPAGES changes.

CL* discarding.

Eliminate ovbcopy define.

Rename NetBSD/powerpc to NetBSD/ofppc.
New sys/arch/powerpc with PowerPC-generic stuff.

Pull in opt_gateway.h as appropriate.

Define ALIGNED_POINTER

PowerPC port