[clang] [llvm] [Clang][AArch64] Implement widening FMMLA intrinsics (PR #165282)

[via llvm-commits]

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Lukacma wrote:

```suggestion
                          [LLVMMatchType<0>, llvm_nxv16i8_ty, llvm_nxv16i8_ty],
```

https://github.com/llvm/llvm-project/pull/165282