[clang] [llvm] [AArch64] Add a check for invalid default features (PR #104435)

[Ahmed Bougacha via cfe-commits]

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@@ -845,7 +857,8 @@ def ProcessorFeatures {
   list<SubtargetFeature> AppleA12 = [HasV8_3aOps, FeatureSHA2, FeatureAES, FeatureFPARMv8,
                                      FeatureNEON, FeaturePerfMon, FeatureFullFP16,
                                      FeatureComplxNum, FeatureCRC, FeatureJS, FeatureLSE,
-                                     FeaturePAuth, FeatureRAS, FeatureRCPC, FeatureRDM];
+                                     FeaturePAuth, FeatureRAS, FeatureRCPC, FeatureRDM,
+                                     FeatureCCIDX];
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ahmedbougacha wrote:

CCIDX should be removed in this one

https://github.com/llvm/llvm-project/pull/104435