Revert "drm/amdgpu: add psp RAP L0 check support"

This reverts commit d86fd724.

Disable PSP RAP L0 self test until to RAP feature ready.

Signed-off-by: Kevin Wang <kevin1.wang@amd.com>
Reviewed-by: Hawking Zhang <Hawking.Zhang@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>