crypto/openssl: fix out-of-place encryption

crypto/openssl: fix out-of-place encryption

When authenticating after encrypting, if the operation
is out-of-place, the destination buffer is the one
that will get authenticated.
If the cipher offset is higher than the authentication
offset, it means that part of the text to authenticate
will be plaintext, so this needs to get copied to the
destination buffer, or the result will be incorrect.

Fixes: d61f70b4c918 ("crypto/libcrypto: add driver for OpenSSL library")
Cc: stable@dpdk.org
Signed-off-by: Pablo de Lara <pablo.de.lara.guarch@intel.com>
Acked-by: Akhil Goyal <akhil.goyal@nxp.com>