[llvm] [AArch64][SME] Remove unused ZA lazy-save (PR #81648)

[Sam Tebbs via llvm-commits]

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@@ -226,8 +231,8 @@ class AArch64FunctionInfo final : public MachineFunctionInfo {
   bool isSVECC() const { return IsSVECC; };
   void setIsSVECC(bool s) { IsSVECC = s; };
 
-  unsigned getLazySaveTPIDR2Obj() const { return LazySaveTPIDR2Obj; }
-  void setLazySaveTPIDR2Obj(unsigned Reg) { LazySaveTPIDR2Obj = Reg; }
+  std::optional<TPIDR2Object> getTPIDR2Obj() { return TPIDR2; }
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SamTebbs33 wrote:

Done!

https://github.com/llvm/llvm-project/pull/81648