isp_get_wwn
static uint64_t isp_get_wwn(ispsoftc_t *, int, int, int);
uint64_t node_wwn = isp_get_wwn(isp, chan, handle, 1);
isp_get_wwn(isp, chan, handle, 1);
isp_get_wwn(isp, chan, handle, 0);
*wwnn = isp_get_wwn(isp, chan, tgt, 1);
*wwnp = isp_get_wwn(isp, chan, tgt, 0);