[MLIR] Fix build break in X86VectorDialect.cpp

mlir/lib/Dialect/X86Vector/IR/X86VectorDialect.cpp:109:10: error: could not convert ‘intrinsicOprnds’ from ‘SmallVector<[...],3>’ to
 ‘SmallVector<[...],6>’                                                           109 |   return intrinsicOprnds;
      |          ^~~~~~~~~~~~~~~
      |          |                                                                    |          SmallVector<[...],3>

Author: kparzysz

mlir/lib/Dialect/X86Vector/IR/X86VectorDialect.cpp

@@ -89,7 +89,7 @@ x86vector::DotOp::getIntrinsicOperands(ArrayRef<Value> operands,
 SmallVector<Value> x86vector::DotInt8Op::getIntrinsicOperands(
     ArrayRef<Value> operands, const LLVMTypeConverter &typeConverter,
     RewriterBase &rewriter) {
-  SmallVector<Value, 3> intrinsicOprnds;
+  SmallVector<Value> intrinsicOprnds;
   Adaptor adaptor(operands, *this);
   intrinsicOprnds.push_back(adaptor.getW());
   // Bitcast `a` and `b` to i32