[clang] [Clang] [Sema] Reject non-power-of-2 `_BitInt` matrix element types (PR #117487)

[Mariya Podchishchaeva via cfe-commits]

================
@@ -2455,6 +2456,10 @@ QualType Sema::BuildMatrixType(QualType ElementTy, Expr *NumRows, Expr *NumCols,
     return QualType();
   }
 
+  if (const auto *BIT = ElementTy->getAs<BitIntType>();
+      BIT && CheckBitIntElementType(*this, AttrLoc, BIT, true))
----------------
Fznamznon wrote:

```suggestion
      BIT && CheckBitIntElementType(*this, AttrLoc, BIT, /*ForMatrixType=*/true))
```


https://github.com/llvm/llvm-project/pull/117487