[llvm] [AMDGPU][MC]FMA-mix instructions should not be supported in GFX908 etc. (PR #109873)

[Stanislav Mekhanoshin via llvm-commits]

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@@ -1426,7 +1425,6 @@ def FeatureISAVersion9_4_Common : FeatureSet<
   [FeatureGFX9,
    FeatureGFX90AInsts,
    FeatureGFX940Insts,
-   FeatureFmaMixInsts,
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rampitec wrote:

It is not lost, we are using fma_mix on all later gfx9. It would be lost after this change. But it is we have renamed it, not SP3.

https://github.com/llvm/llvm-project/pull/109873