drm/amd/pm: Disable SMU messages in navi10 sriov

[Why]
sriov vf send unsupported SMU message lead to fail.

[How]
disable related messages in sriov.

Signed-off-by: Yifan Zha <Yifan.Zha@amd.com>
Acked-by: Jingwen Chen <Jingwen.Chen2@amd.com>
Reviewed-by: Jack Zhang <Jack.Zhang1@amd.com>
Reviewed-by: Monk Liu <monk.liu@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>