drm/amd/amdgpu: add fini virt data exchange to ip_suspend

[Why]
when try to shutdown guest vm in sriov mode, virt data
exchange is not fini. After vram lost, trying to write
vram could hang cpu.

[How]
add fini virt data exchange in ip_suspend
Signed-off-by: Jingwen Chen <Jingwen.Chen2@amd.com>
Reviewed-by: Jack Zhang <Jack.Zhang1@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

drivers/gpu/drm/amd/amdgpu/amdgpu_device.c

@@ -2776,8 +2776,10 @@ int amdgpu_device_ip_suspend(struct amdgpu_device *adev)
 {
 	int r;
 
-	if (amdgpu_sriov_vf(adev))
+	if (amdgpu_sriov_vf(adev)) {
+		amdgpu_virt_fini_data_exchange(adev);
 		amdgpu_virt_request_full_gpu(adev, false);
+	}
 
 	r = amdgpu_device_ip_suspend_phase1(adev);
 	if (r)