[gcc(refs/users/meissner/heads/work201)] Add rs6000 architecture masks.

https://gcc.gnu.org/g:97c13dac80e918b2d23d210a9c7b3140c861e4b5 commit 97c13dac80e918b2d23d210a9c7b3140c861e4b5 Author: Michael Meissner Date: Mon Apr 14 20:31:44 2025 -0400 Add rs6000 architecture masks. This patch begins the journey to move architecture bits that are not user IS

[gcc(refs/users/meissner/heads/work201)] Add rs6000 architecture masks.

https://gcc.gnu.org/g:680d73b40150fad81c2531e155f2ecb58452b9d0 commit 680d73b40150fad81c2531e155f2ecb58452b9d0 Author: Michael Meissner Date: Mon Apr 14 20:31:44 2025 -0400 Add rs6000 architecture masks. This patch begins the journey to move architecture bits that are not user IS