radv: Free empty_cs on device destruction.

Signed-off-by: Bas Nieuwenhuizen <basni@google.com>
Reviewed-by: Dave Airlie <airlied@redhat.com>

src/amd/vulkan/radv_device.c

@@ -993,6 +993,8 @@ void radv_DestroyDevice(
 			radv_queue_finish(&device->queues[i][q]);
 		if (device->queue_count[i])
 			vk_free(&device->alloc, device->queues[i]);
+		if (device->empty_cs[i])
+			device->ws->cs_destroy(device->empty_cs[i]);
 	}
 	radv_device_finish_meta(device);