[clang] [FMV][AIX] Implement target_clones (cpu-only) (PR #177428)

[Zarko Todorovski via cfe-commits]

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@@ -199,6 +199,11 @@ class LLVM_LIBRARY_VISIBILITY PPCTargetInfo : public TargetInfo {
 
   bool supportsTargetAttributeTune() const override { return true; }
 
+  bool isValidFeatureName(StringRef Name) const override;
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ZarkoT wrote:

As above, can be removed. 

https://github.com/llvm/llvm-project/pull/177428