prom_extract_u16
if (prom_extract_u16(nvl, "vendor-id", &vid) &&
prom_extract_u16(nvl, "device-id", &did) &&
if (prom_extract_u16(nvl, "subsystem-vendor-id", &svid) &&
prom_extract_u16(nvl, "subsystem-id", &sdid)) {
if (prom_extract_u16(nvl, "vendor-id", &vid) &&
prom_extract_u16(nvl, "device-id", &did)) {