drm/amdgpu/sriov Don't send msg when smu suspend

For sriov and pp_onevf_mode, do not send message to set smu
status, because smu doesn't support these messages under VF.

Besides, it should skip smu_suspend when pp_onevf_mode is disabled.

Signed-off-by: Jack Zhang <Jack.Zhang1@amd.com>
Acked-by: Alex Deucher <alexander.deucher@amd.com>
Acked-by: Evan Quan <evan.quan@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>