[clang] [NFC] Replace bool <= bool comparison (PR #102948)

[Mital Ashok via cfe-commits]

================
@@ -542,7 +542,7 @@ NarrowingKind StandardConversionSequence::getNarrowingKind(
       // If the bit-field width was dependent, it might end up being small
       // enough to fit in the target type (unless the target type is unsigned
       // and the source type is signed, in which case it will never fit)
-      if (DependentBitField && (FromSigned <= ToSigned))
+      if (DependentBitField && !(FromSigned && !ToSigned))
----------------
MitalAshok wrote:

This could be

```suggestion
      if (DependentBitField && (!FromSigned || ToSigned))
```

But the way written follows the comment exactly and should optimise the same

https://github.com/llvm/llvm-project/pull/102948