[llvm] [AArch64] Enable quad variant st1b/ld1b for callee-saved spills (PR #225100)

[Benjamin Maxwell via llvm-commits]

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@@ -1980,7 +2026,7 @@ bool AArch64FrameLowering::spillCalleeSavedRegisters(
   const AArch64InstrInfo &TII = *Subtarget.getInstrInfo();
   bool NeedsWinCFI = needsWinCFI(MF);
   DebugLoc DL;
-  SmallVector<RegPairInfo, 8> RegPairs;
+  SmallVector<RegGroupInfo, 8> RegPairs;
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MacDue wrote:

```suggestion
  SmallVector<RegGroupInfo, 8> RegGroups;
```

https://github.com/llvm/llvm-project/pull/225100