[llvm] [llvm][AArch64] apple-m4 is armv9.2-a (PR #98267)

[Sam Elliott via llvm-commits]

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@@ -797,7 +797,7 @@ def HasV8_9aOps : Architecture64<8, 9, "a", "v8.9a",
   !listconcat(HasV8_8aOps.DefaultExts, [FeatureSPECRES2, FeatureCSSC,
     FeatureRASv2])>;
 def HasV9_0aOps : Architecture64<9, 0, "a", "v9a",
-  [HasV8_5aOps, FeatureMEC],
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lenary wrote:

Can you move this into the additional defaultexts, instead of removing it?

https://github.com/llvm/llvm-project/pull/98267