[mlir][Linalg] Fix missing template keyword.

mlir/lib/Dialect/Linalg/IR/LinalgOps.cpp

 namespace {
 /// Pattern to collapse producer/consumer reshape ops that are both collapsing
 /// dimensions or are both expanding dimensions.
 template <typename ReshapeOpTy>
 struct CollapseReshapeOps : public OpRewritePattern<ReshapeOpTy> {
   using OpRewritePattern<ReshapeOpTy>::OpRewritePattern;
   LogicalResult matchAndRewrite(ReshapeOpTy reshapeOp,
                                 PatternRewriter &rewriter) const override {
-    auto srcReshapeOp =
-        dyn_cast_or_null<ReshapeOpTy>(reshapeOp.src().getDefiningOp());
+    auto srcReshapeOp = reshapeOp.src().template getDefiningOp<ReshapeOpTy>();
     if (!srcReshapeOp)
       return failure();
 
     auto areReshapeOpsFoldable = [](ShapedType largerType,
                                     ShapedType intermediateType,
                                     ShapedType smallerType) -> bool {
       return largerType.getRank() > intermediateType.getRank() &&
              intermediateType.getRank() > smallerType.getRank() &&

 } // namespace
 
 template <typename ReshapeOpTy>
 static OpFoldResult foldReshapeOp(ReshapeOpTy reshapeOp) {
   // Fold producer-consumer reshape ops that where the operand type of the
   // producer is same as the return type of the consumer. This can only be
   // verified if the shapes in question are static.
   ReshapeOpTy reshapeSrcOp =
-      dyn_cast_or_null<ReshapeOpTy>(reshapeOp.src().getDefiningOp());
+      reshapeOp.src().template getDefiningOp<ReshapeOpTy>();
   if (reshapeSrcOp && reshapeSrcOp.getSrcType().hasStaticShape() &&
       reshapeOp.getResultType().hasStaticShape() &&
       reshapeSrcOp.getSrcType() == reshapeOp.getResultType())
     return reshapeSrcOp.src();
   return nullptr;
 };
 
 /// Return true if the reassociation specification is valid, false otherwise.