[MLIR] Turn `RemarkFormat` into an enum class (NFC) (#158733)

This is fixing a gcc warning and aligning with the other enums in the
file.

GitOrigin-RevId: 7936b6f1133516c427c478104606d9276da6f81b
2 files changed
tree: e9c3423fb37f0e569a93c795bb2318ddffd054a0
  1. benchmark/
  2. cmake/
  3. docs/
  4. examples/
  5. include/
  6. lib/
  7. python/
  8. test/
  9. tools/
  10. unittests/
  11. utils/
  12. .clang-format
  13. .clang-tidy
  14. CMakeLists.txt
  15. LICENSE.TXT
  16. Maintainers.md
  17. README.md
README.md

Multi-Level Intermediate Representation

See https://mlir.llvm.org/ for more information.