[llvm] [X86] Fix some values for Znver4 model (PR #161405)

[Simon Pilgrim via llvm-commits]

https://github.com/RKSimon commented:

I expect theres some llvm-mca changes. Try `ninja check-llvm-tools-llvm-mca-x86`

https://github.com/llvm/llvm-project/pull/161405