[llvm] [IR][NFC] Cleanup CmpInst signatures / code docs (PR #86441)

[Yingwei Zheng via llvm-commits]

dtcxzyw wrote:

> Change param names to recommended upper case format for static methods in CmpInst for consistency Implement suggestion from @dtcxzyw.
> 
> cc @dtcxzyw @tschuett

Please don't include `@` in the commit message :( I will receive an email each time someone updates their forks.


https://github.com/llvm/llvm-project/pull/86441