Idle bo's PTE needs to be re-created when resetting VM state machine.
Set idle bo's vm_bo as moved to mark it as invalid.

Fixes: 55bf196f ("drm/amdgpu: reset VM when an error is detected")
Signed-off-by: ZhenGuo Yin <zhenguo.yin@amd.com>
Reviewed-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>