drm/amdgpu: Use nbio callback for nv and soc21

Make the new ascis to follow nbio callback method to get pcie replay
count.

Signed-off-by: Lijo Lazar <lijo.lazar@amd.com>
Reviewed-by: Hawking Zhang <Hawking.Zhang@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>