drm/amdgpu/virt: enable virtual display

Virtual display is default setting for virtualization, enable it.
Signed-off-by: Xiangliang Yu <Xiangliang.Yu@amd.com>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Acked-by: Christian König <christian.koenig@amd.com>
Reviewed-by: Monk Liu <Monk.Liu@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

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

@@ -94,6 +94,10 @@ int amdgpu_map_static_csa(struct amdgpu_device *adev, struct amdgpu_vm *vm)
 
 void amdgpu_virt_init_setting(struct amdgpu_device *adev)
 {
+	/* enable virtual display */
+	adev->mode_info.num_crtc = 1;
+	adev->enable_virtual_display = true;
+
 	mutex_init(&adev->virt.lock);
 }