cryptodev: fix build with -Ofast

cryptodev: fix build with -Ofast

When compiling with an application that includes rte_cryptodev.h with
Ofast, an error is reported regarding enumeration
RTE_CRYPTO_OP_TYPE_UNDEFINED not handled in switch case in function
 __rte_crypto_op_reset().

Fix this by adding a case for RTE_CRYPTO_OP_TYPE_UNDEFINED.

Fixes: c0f87eb5252b ("cryptodev: change burst API to be crypto op oriented")
Cc: stable@dpdk.org
Signed-off-by: Ian Stokes <ian.stokes@intel.com>
Acked-by: Pablo de Lara <pablo.de.lara.guarch@intel.com>