[gcc(refs/users/meissner/heads/work176)] Add rs6000 architecture masks.

https://gcc.gnu.org/g:7a80d6af56554fe3388d59f71341a6c96b5d5d01 commit 7a80d6af56554fe3388d59f71341a6c96b5d5d01 Author: Michael Meissner Date: Fri Aug 16 22:34:18 2024 -0400 Add rs6000 architecture masks. This patch begins the journey to move architecture bits that are not user IS

[gcc(refs/users/meissner/heads/work176)] Add rs6000 architecture masks.

https://gcc.gnu.org/g:a073d611d32e7ea2c7d392f64cb7a627560e3315 commit a073d611d32e7ea2c7d392f64cb7a627560e3315 Author: Michael Meissner Date: Fri Aug 16 22:34:18 2024 -0400 Add rs6000 architecture masks. This patch begins the journey to move architecture bits that are not user IS