Declare oeacpufeat once, in powerpc/oea/cpu_subr.c, rather than in
N different locore.S files.

Retire ipkdb entirely. The option was removed from the config files
yesterday.

ok kamil christos

Don't include *pmap.h in assembly files. Get the needed definitions
from "assym.h".

Make a common genassym.cf (powerpc/genassym.cf) and then
only put specific stuff in foo/genassym.cf

Kill _NOREGNAMES. Everything should be using %rX now. If it doesn't it
soon will.

Fix some historical powerpc curiocity which had kernfs depend on
startsym/endsym, and which crept into most powerpc ports.

Adapt to <spr.h> breakup.

Kill proc0paddr. Use lwp0.l_addr instead.

Ifdef out all the MPC601 code with PPC_OEA601. Now only arches that have the
possibility of running on an MPC601, are infected with all the extra code
and nops that it added.

Also, fix compilation

Ifdef out all the MPC601 code with PPC_OEA601. Now only arches that have the
possibility of running on an MPC601, are infected with all the extra code
and nops that it added.

Also, fix compilation that I broke with the pmap code, by adding
oeacpufeat to the locores of various ppc arches. Noted by mlelstv.

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Fix boot failure problem with DDB enabled.

Update with softintr, evcnt and cpu_info changes from prep.

merge ktrace-lwp.

Add IBM Network Station 1000 port. From John Gordon and updated by me.