[clang] [llvm] [Dwarf] Support heterogeneous DW_{OP,AT}s needed for AMDGPU CFI (PR #153883)

[Matt Arsenault via cfe-commits]

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@@ -1011,6 +1018,7 @@ LLVM_ABI StringRef IndexString(unsigned Idx);
 LLVM_ABI StringRef FormatString(DwarfFormat Format);
 LLVM_ABI StringRef FormatString(bool IsDWARF64);
 LLVM_ABI StringRef RLEString(unsigned RLE);
+LLVM_ABI StringRef AddressSpaceString(unsigned AS, llvm::Triple TT);
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arsenm wrote:

```suggestion
LLVM_ABI StringRef AddressSpaceString(unsigned AS, llvm::Triple &TT);
```

https://github.com/llvm/llvm-project/pull/153883