[llvm] [clang] [compiler-rt] [AArch64][SME] Add support for sme-fa64 (PR #70809)

[Matthew Devereau via cfe-commits]

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@@ -162,6 +163,7 @@ enum ArchExtKind : unsigned {
   AEK_FPMR =          58, // FEAT_FPMR
   AEK_FP8 =           59, // FEAT_FP8
   AEK_FAMINMAX =      60, // FEAT_FAMINMAX
+  AEK_SMEFA64 =       61, // FEAT_SMEFA64
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MDevereau wrote:

I've moved it to be 

  AEK_SME =           38, // FEAT_SME
  AEK_SMEF64F64 =     39, // FEAT_SME_F64F64
  AEK_SMEI16I64 =     40, // FEAT_SME_I16I64
  AEK_SMEFA64 =       41, // FEAT_SME_FA64

https://github.com/llvm/llvm-project/pull/70809