* gas/ppc/altivec_xcoff.s: Do not use .machine pseudo-ops as it overrides gas options.

* gas/ppc/altivec_xcoff.s: Do not use .machine pseudo-ops as it overrides gas options.
* gas/ppc/altivec_xcoff64.s: Likewise.
* gas/ppc/booke_xcoff64.s: Likewise.
* gas/ppc/altivec_xcoff.d: Accept 32bits offsets.
* gas/ppc/booke_xcoff.s: Do not use .machine pseudo-op and remove
* booke64 opcodes.
* gas/ppc/booke_xcoff.d: Accept 32bits offsets and renumber.
* gas/ppc/booke_xcoff64.d: Use booke opcodes.