Asynchronous Encryption/Decryption

Asynchronous Encryption/Decryption

In the handle_esp_xxx_bulk functions, we are not dequeuing every
crypto_op that was enqueued in this function. The while loop has been
replaced by a single call to the dequeue function. If crypto_ops are
still in flight, we count on the fact they will be dequeued when the
handle_esp_xxx_bulk function is called next time. Note that this will
only happen if new packets are coming in. If no new packets are coming
in, there might be some packets in flight that will not be dequeued.
When calling the rte_crypto_op_pool_create function, we now pass the
number of mbufs as specified in the PROX config file (mempool size), and
not a hard coded number. The init code has also been put more in sync
with recent version of the l2fwd_crypto example code.

Signed-off-by: Luc Provoost <luc.provoost@gmail.com>
Change-Id: Idfab13a273bf76831e5133cf59149fc93949f1ab