di_init_driver
node = di_init_driver(dcip->dci_driver, flags);
di_init_driver(SEEPROM_DRIVER_NAME, 0);
extern di_node_t di_init_driver(const char *drv_name, uint_t flag);
root_node = di_init_driver("glvc", DINFOCPYALL);
root_node = di_init_driver("vldc", DINFOCPYALL);