crypto: make crypto-dispatch node working in adaptive mode

This patch can make crypto dispatch node adaptively switching
between pooling and interrupt mode, and improve vpp overall
performance.

Type: improvement
Signed-off-by: Xiaoming Jiang <jiangxiaoming@outlook.com>
Change-Id: I845ed1d29ba9f3c507ea95a337f6dca7f8d6e24e

src/plugins/dpdk/cryptodev/cryptodev_raw_data_path.c

@@ -516,8 +516,7 @@ cryptodev_raw_dequeue (vlib_main_t *vm, u32 *nb_elts_processed,
 	}
     }
 
-  if (cm->dispatch_mode == VNET_CRYPTO_ASYNC_DISPATCH_INTERRUPT &&
-      inflight > 0)
+  if (inflight > 0)
     vlib_node_set_interrupt_pending (vlib_get_main_by_index (vm->thread_index),
 				     cm->crypto_node_index);