crypto/aesni_mb: fix security session clearing

crypto/aesni_mb: fix security session clearing

When destroying a security session, the AESNI-MB PMD attempted to clear
the private aesni_mb session object to remove any key material. However,
the function aesni_mb_pmd_sec_sess_destroy() cleared the security session
object instead of the private session object.

This patch fixes this issue by now clearing the private session object.

Fixes: fda5216fba55 ("crypto/aesni_mb: support DOCSIS protocol")
Cc: stable@dpdk.org
Signed-off-by: David Coyle <david.coyle@intel.com>
Acked-by: Pablo de Lara <pablo.de.lara.guarch@intel.com>