DPAA crypto driver can support 64 bytes size digest size
for SHA512-HMAC.
This patch changes the value of macro max supported digest size to
64.
Fixes: c3e85bdcc6 ("crypto/dpaa_sec: add crypto driver for NXP DPAA platform")
Cc: stable@dpdk.org
Signed-off-by: Gagandeep Singh <g.singh@nxp.com>