[llvm] [PowerPC] clean unused PPC target feature FeatureBPERMD (PR #159782)

[Sergei Barannikov via llvm-commits]

s-barannikov wrote:

It broke the CI as well.
I'm not sure I understand why the CI passed on this PR. It is not the first time I see that CI passes on a PR but starts failing after the PR is merged.


https://github.com/llvm/llvm-project/pull/159782