Revert "drm/amdgpu: Add nbio support for vega20 (v2)"

Revert this to add proper nbio 7.4 support.

This reverts commit f5b2e1fa321eff20a9418ebd497d8a466f024a85.

Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
2 files changed