_C_LABEL() and _ASM_LABEL() are no longer useful in the "everything
is ELF" world. Eliminate use of them in amd64, arm64, armv7, i386,
macppc, mips64, and sparc64 code.

ok deraadt@ jca@ krw@

Switch some uses of msr that only deal with interrupts/mode to use
just the control field ('c' bits 7:0) instead of 'all' which includes
the flags field ('f' bits 31:24) which isn't modified.

The 'mrs' instruction only deals with the whole register without
masking. Remove the use of cpsr_all/spsr_all with 'mrs' and just use
the register names. This matches the arm docs and avoids confus

The 'mrs' instruction only deals with the whole register without
masking. Remove the use of cpsr_all/spsr_all with 'mrs' and just use
the register names. This matches the arm docs and avoids confusion as
cpsr_all/spsr_all don't include bits 23->8 when used with the 'msr'
instruction but do with 'mrs'.

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Late spring cleaning of the arm code for old dusty bits we do not want to
keep:
- remove bootconfig parameter passing feature (unused).
- unifdef __PROG32 and remove all remains of arm26 code.
- remo

Late spring cleaning of the arm code for old dusty bits we do not want to
keep:
- remove bootconfig parameter passing feature (unused).
- unifdef __PROG32 and remove all remains of arm26 code.
- remove ARMFPE support (unused).
- remove support for ARM2, ARM2AS, ARM3, ARM6, ARM7, ARM7TDMI and StrongARM
processor families, and the related silicon bug workarounds (especially
the SA-110 STM^ bug).
- remove cpu_functions no longer necessary after previous removals.
- remove ARM32_DISABLE_ALIGNMENT_FAULTS option (unused).
- make FIQ support conditional on option FIQ (unused, but may be eventually).

Discussed with drahn@ and jasper@ long ago, I was sitting on this commit for
no good reason.

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Arm port, NetBSD codebase stripped down, 32bit only support.