[llvm] CodeGen/test: improve a test, regen with UTC (PR #113338)

[Artem Belevich via llvm-commits]

Artem-B wrote:

Looks like the test updates crossed in the air with the changes that switched from `bfe/bfi` to `prmt`.
These checks must be re-generated, if it has not been done yet.

https://github.com/llvm/llvm-project/pull/113338