[llvm] [NFC] Fix outdated RecurKind comments (PR #144014)

[Ivan R. Ivanov via llvm-commits]

ivanradanov wrote:

Sorry, I was going off of these two commits which say they unify the int and float kinds
```
commit 0240129218eebcc5b6b5d31f9458c2f827163c9e
Author: Ramkumar Ramachandra <ramkumar.ramachandra at codasip.com>
Date:   Fri May 23 11:57:30 2025 +0100

    [IVDesc] Unify RecurKinds [I|F]AnyOf (#118393)
    
    Co-authored-by: Mel Chen <mel.chen at sifive.com>

commit b81170ecffb5f53d52eab5d3424ba6f1c8ef97d3
Author: Ramkumar Ramachandra <ramkumar.ramachandra at codasip.com>
Date:   Thu May 22 22:48:01 2025 +0100

    [IVDesc] Unify RecurKinds [I|F]FindLastIV (NFC) (#141082)

```

https://github.com/llvm/llvm-project/pull/144014