[DynInst_API:] [dyninst/dyninst] b5facb: Fix compiler warnings in amdgpu cdna2 code (#1198)

[noreply@xxxxxxxxxx]

  Branch: refs/heads/master
  Home:   https://github.com/dyninst/dyninst
  Commit: b5facb8f2a4f29d6fdedbcc11553c0844d33710c
      https://github.com/dyninst/dyninst/commit/b5facb8f2a4f29d6fdedbcc11553c0844d33710c
  Author: Tim Haines <thaines.astro@xxxxxxxxx>
  Date:   2022-02-24 (Thu, 24 Feb 2022)

  Changed paths:
    M common/src/dyn_regs.C
    M instructionAPI/src/AMDGPU/cdna2/InstructionDecoder-amdgpu-cdna2.C
    M instructionAPI/src/AMDGPU/cdna2/decodeOperands.C
    M instructionAPI/src/Register.C

  Log Message:
  -----------
  Fix compiler warnings in amdgpu cdna2 code (#1198)

* Fix 'unused-variable' warnings from gcc

* Fix 'unused-parameter' warnings from gcc