[AIX] Allow safe for 32bit P8 VSX pattern matching

Pull some of the safe for 32bit pattern matching for Pwr8 and above.

Reviewed By: nemanjai

Differential Revision: https://reviews.llvm.org/D97909

GitOrigin-RevId: 6b7838b68cc49621f3c92d8603f95e801d10f759
4 files changed