Improve ECB performance (48+14*rounds -> 18+13*rounds) and reserve for hand-coded zero-copy AES_cbc_encrypt.
Improve ECB performance (48+14*rounds -> 18+13*rounds) and reserve for
hand-coded zero-copy AES_cbc_encrypt.

openssl/openssl,openssl/openssl,openssl/openssl,openssl/openssl,openssl/openssl,openssl/openssl