[llvm] [llvm] use 64-bit types for result of getDwarfRegNum (NFC) (PR #109494)

[Walter Erquinigo via llvm-commits]

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@@ -43,8 +43,6 @@ struct LanaiRegisterInfo : public LanaiGenRegisterInfo {
   Register getFrameRegister(const MachineFunction &MF) const override;
   Register getBaseRegister() const;
   bool hasBasePointer(const MachineFunction &MF) const;
-
-  int getDwarfRegNum(unsigned RegNum, bool IsEH) const;
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walter-erquinigo wrote:

why did you remove this?

https://github.com/llvm/llvm-project/pull/109494