openssl: update cryptodev digests patch

The adaptation from commit 74dd54bf is incomplete/bad causing segfaults when
using cryptodev for digest offload, examples: openssh, openssl speed, others.
Tested on real hardware (talitos).

Signed-off-by: Gustavo Zacarias <gustavo@zacarias.com.ar>
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>