[clang] [llvm] [AMDGPU] Introduce a new generic target `gfx9-4-generic` (PR #115190)

[Matt Arsenault via cfe-commits]

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@@ -121,6 +121,7 @@ static const OffloadArchToStringMap arch_names[] = {
     GFX(909),  // gfx909
     GFX(90a),  // gfx90a
     GFX(90c),  // gfx90c
+    {OffloadArch::GFX9_4_GENERIC, "gfx9-4-generic", "compute_amdgcn"},
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arsenm wrote:

I guess this precedent is already set in 10-1, but I think this was a mistake 

https://github.com/llvm/llvm-project/pull/115190