07b573e31 tests/kms_async_flips: Remove allow_fail flag from async flip tests
e6e0c9a58 tests/kms_async_flips: Add test for all async format modifiers
9153d6efd tests/kms_async_flips: use in_formats_async for async modifiers
e635883ae lib/igt_kms: Add support to retrieve async modifiers and formats