message: [NFC] Replace usage of PatternMatchResult with LogicalResult
diff: @@ -95,7 +95,7 @@ class PointwiseToLinalgConverter : public OpConversionPattern<OpTy> {
  // here is that are broadcasts have been made explicit.
  unsigned nloops = argType.getRank();
  - if (isLHLO && !nloops) ConversionPattern::matchFailure();
  + if (isLHLO && !nloops) return failure();
  int operandCount = (isLHLO ? args.size() - 1 : args.size());
  auto verifyArgOrResultType = [&](Value val) -> ShapedType {
  