[llvm] [RISCV] Zabha/Zacas implies Zaamo (PR #115694)

[Pengcheng Wang via llvm-commits]

https://github.com/wangpc-pp approved this pull request.

LGTM.
IIUC, there should be no compatibility issue since both of these two extensions are new?

https://github.com/llvm/llvm-project/pull/115694