crypto_unregister
crypto_unregister(sc->sc_cid, CRYPTO_AES_CBC);
crypto_unregister(sc->sc_cid, CRYPTO_MD5_HMAC_96);
crypto_unregister(sc->sc_cid, CRYPTO_MD5_HMAC);
crypto_unregister(sc->sc_cid, CRYPTO_SHA1_HMAC_96);
crypto_unregister(sc->sc_cid, CRYPTO_SHA1_HMAC);
crypto_unregister(sc->sc_cid, CRYPTO_RIPEMD160_HMAC_96);
crypto_unregister(sc->sc_cid, CRYPTO_RIPEMD160_HMAC);
crypto_unregister(sc->sc_cid, CRYPTO_SHA2_HMAC);
extern int crypto_unregister(uint32_t driverid, int alg);