[llvm-branch-commits] [llvm] release/19.x: [PowerPC] Fix mask for __st[d/w/h/b]cx builtins (#104453) (PR #106085)

[Amy Kwan via llvm-branch-commits]

https://github.com/amy-kwan approved this pull request.

LGTM.

https://github.com/llvm/llvm-project/pull/106085