[llvm] [AMDGPU] Implement workaround for GFX11.5 export priority (PR #99273)

[Matt Arsenault via llvm-commits]

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@@ -1597,20 +1603,23 @@ def FeatureISAVersion11_5_0 : FeatureSet<
   !listconcat(FeatureISAVersion11_Common.Features,
     [FeatureSALUFloatInsts,
      FeatureDPPSrc1SGPR,
-     FeatureVGPRSingleUseHintInsts])>;
+     FeatureVGPRSingleUseHintInsts,
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arsenm wrote:

> GFX 9 generic target doesn't follow this workaround absorbing convention,

It certainly is supposed to 

https://github.com/llvm/llvm-project/pull/99273