amdgpu_invalid_rreg
adev->smc_rreg = &amdgpu_invalid_rreg;
adev->pcie_rreg = &amdgpu_invalid_rreg;
adev->pciep_rreg = &amdgpu_invalid_rreg;
adev->uvd_ctx_rreg = &amdgpu_invalid_rreg;
adev->didt_rreg = &amdgpu_invalid_rreg;
adev->gc_cac_rreg = &amdgpu_invalid_rreg;