cpu/x64_64: Move MMU page table types back to <cpu/pmap.h>.
Reduce namespace pollution. These types are common for both
pc64/vkernel64 and are used in pmap context only.
All userland cases need just VM_MAX_USER_ADDRESS, PS_STRINGS constants
through <machine/vmparam.h> with huge cpp expansion that requires
<machine/pmap.h> header inclusion anyway. Simplify it.
* Hard-code NPTEPG/NPDEPG/NPDPEPG/NPML4EPG constants to properly solve
header inclusion ordering. The SHIFT constants are hard-coded already
(log2() values) so there are no reasons to pretend everything will
adjust automatically.
* Use LU suffixes, debug printf() in vkernel64 use %ld types.
* Optionally reorder includes in libc setproctitle.c.
* Optionally add explicit includes in libkvm where pmap.h is only
coming from <sys/user.h>. The kvm_*_x86_64.c use X86_PG_* constants.
For now keep PDESIZE/PTESIZE (used in pc64 genassym.c).
No intermediates differences observed.
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