prom_get_security_key
int prom_get_security_key(char *keyname, caddr_t buf, int buflen, int *keylen,
ret = prom_get_security_key(BP_CHAP_USER, chap_user,
ret = prom_get_security_key(BP_CHAP_PASSWORD, chap_password,
int prom_get_security_key(char *keyname, caddr_t buf, int buflen, int *keylen,