[llvm] [clang] [TargetParser] Define AEK_FCMA and AEK_JSCVT for tsv110 (PR #75516)

[Momchil Velikov via llvm-commits]

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@@ -81,6 +81,15 @@ static bool DecodeAArch64Features(const Driver &D, StringRef text,
     else
       return false;
 
+    // +jsconv and +complxnum implies +neon and +fp-armv8
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momchil-velikov wrote:

According to the latest Arm ARM (https://developer.arm.com/documentation/ddi0487/ja/?lang=en) the architecrtural extensions `FEAT_FCMA` and `FEAT_JSCVT` are mandatory in Armv8.3-a and are not optional in any architecture version.

For such features, our convention is to not expose them as command-line options.

https://github.com/llvm/llvm-project/pull/75516