[clang] [llvm] [AArch64] Decouple feature dependency expansion. (PR #94279)

[Tomas Matheson via cfe-commits]

================
@@ -166,6 +174,11 @@ void AArch64::ExtensionSet::enable(ArchExtKind E) {
   Touched.set(E);
   Enabled.set(E);
 
+  // These depend on each other, meaning you can't have one without the other.
+  // We don't want this to be in ExtensionDependencies to avoid infinite loops.
+  if (E == AEK_FP)
+    enable(AEK_SIMD);
----------------
tmatheson-arm wrote:

Unrelated change? They do in the Arm ARM, but we want them to be independently 
configurable in LLVM.

https://github.com/llvm/llvm-project/pull/94279
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