gve_device_option_nic_timestamp
struct gve_device_option_nic_timestamp *dev_op_nic_timestamp = NULL;
struct gve_device_option_nic_timestamp **dev_op_nic_timestamp,
struct gve_device_option_nic_timestamp **dev_op_nic_timestamp,
const struct gve_device_option_nic_timestamp
static_assert(sizeof(struct gve_device_option_nic_timestamp) == 4);