[clang] [llvm] [PowerPC][X86] Make cpu id builtins target independent and lower for PPC (PR #68919)

[Amy Kwan via cfe-commits]

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@@ -873,3 +873,17 @@ ArrayRef<Builtin::Info> PPCTargetInfo::getTargetBuiltins() const {
   return llvm::ArrayRef(BuiltinInfo,
                         clang::PPC::LastTSBuiltin - Builtin::FirstTSBuiltin);
 }
+
+bool PPCTargetInfo::validateCpuSupports(StringRef FeatureStr) const {
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amy-kwan wrote:

Should this be `CPU` instead of `Cpu` for both of these validate functions?

https://github.com/llvm/llvm-project/pull/68919