OpenSSL with cryptdev support uses the data encryption unit (DEU) driver
for hard accelerated processing of ciphers/digests, if the flag
CRYPTO_ALG_KERN_DRIVER_ONLY is set.

Signed-off-by: Mathias Kresin <dev@kresin.me>
[fix commit title prefix]
Signed-off-by: Daniel Kestrel <kestrel1974@t-online.de>