drm/amdgpu/psp: Do not load asd for SRIOV

If psp version doesn't match asd version, asd loading will be
failed. Add workaround to bypass it for sriov.

Signed-off-by: Daniel Wang <Daniel.Wang2@amd.com>
Signed-off-by: Xiangliang Yu <Xiangliang.Yu@amd.com>
Reviewed-by: Monk Liu <Monk.Liu@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>