[mlir][sparse] Correcting a few typos

[wrengr]

rebased. Also, could not reproduce the buildbot failures

buildbot failures listed at: https://buildkite.com/llvm-project/premerge-checks/builds/58660#042b77a2-a416-47b2-97dd-149397b1cd3f

mlir/lib/Dialect/SparseTensor/Transforms/SparseTensorConversion.cpp

-//===- SparseTensorLowering.cpp - Sparse tensor primitives conversion -----===//
+//===- SparseTensorConversion.cpp - Sparse tensor primitives conversion ---===//
 //
 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
 // See https://llvm.org/LICENSE.txt for license information.
 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
 //
 //===----------------------------------------------------------------------===//
 //
 // Convert sparse tensor primitives to calls into a runtime support library.
class SparseTensorConvertConverter : public OpConversionPattern<ConvertOp> {
   LogicalResult
   matchAndRewrite(ConvertOp op, OpAdaptor adaptor,
                   ConversionPatternRewriter &rewriter) const override {
     Type resType = op.getType();
     auto encDst = getSparseTensorEncoding(resType);
     auto encSrc = getSparseTensorEncoding(op.source().getType());
     if (encDst && encSrc) {
       // This is a sparse => sparse conversion, which is handled as follows:
-      //   t = src->asCOO();         ; src to COO in dst order
+      //   t = src->toCOO();         ; src to COO in dst order
       //   dst = newSparseTensor(t)
       // Using the coordinate scheme as an intermediate does not always
       // yield the fastest conversion but avoids the need for a full
       // O(N^2) conversion matrix.
       Value perm;
       Value coo =
           genNewCall(rewriter, op, encDst, 3, perm, adaptor.getOperands()[0]);
       rewriter.replaceOp(op, genNewCall(rewriter, op, encDst, 1, perm, coo));

mlir/lib/ExecutionEngine/SparseUtils.cpp

 /// Helper to add value to coordinate scheme, one per value type.
 IMPL3(addEltF64, double)
 IMPL3(addEltF32, float)
 IMPL3(addEltI64, int64_t)
 IMPL3(addEltI32, int32_t)
 IMPL3(addEltI16, int16_t)
 IMPL3(addEltI8, int8_t)
 
-#undef TEMPLATE
 #undef CASE
 #undef IMPL1
 #undef IMPL2
 #undef IMPL3
 
 //===----------------------------------------------------------------------===//
 //
 // Public API with methods that accept C-style data structures to interact