[llvm] [PowerPC] Check ResNo at end of BitPermutationSelector::Select32 (PR #151429)

[George Koehler via llvm-commits]

kernigh wrote:

I forced-push a commit which fixes 64-bit permutation in my last comment, and also loses the extra register move in my 1st comment.

https://github.com/llvm/llvm-project/pull/151429