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

[Brad Smith via llvm-commits]

brad0 wrote:

> This LGTM. Thank-you for the fix! Sorry for missing the pings.

Thank you. Should I wait for a second set of eyes?

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