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## Motivation
This PR adds mixed data types and mixed scale types support in scale
WMMA specialisations.
## Technical Details
- Replaced `ScaleDataTypeToFlag_v` with `PackedDataTypeToFlag_v` and
adjusted WMMA scale selector to the way as MFMA one.
- Simplified scale_gfx125.hpp with macros.
- Added WMMA scale specialisations with mixed data types and scale
types.
- Introduced `is_legal_combination` to restrict which combinations of
ADataType/BDataType/ScaleAValueType/ScaleBValueType the `exec()` can be
instantiated.
- Pleased the compiler on gfx1250 emulator to make compilation working.
## Test Plan
All the new wrappers were added to the test suite in
test_amdgcn_mma_layout.inc.
## Test Result
Test should pass.
## Submission Checklist
- [x] Look over the contributing guidelines at
https://github.com/ROCm/ROCm/blob/develop/CONTRIBUTING.md#pull-requests.
close#8949
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