crypto/scheduler: fix last element for valid args

[ upstream commit 34019b7b65d4d936649fab29fdee45ec3ada1a8d ]

The list of valid arguments for Scheduler PMD should be terminated with
a NULL entry, as expected by rte_kvargs_parse.

Without this, if an invalid key name was used, a global buffer overflow
occurred resulting in a segmentation fault.

Fixes: 503e9c5 ("crypto/scheduler: register as vdev driver")

Signed-off-by: Ciara Power <ciara.power@intel.com>
Acked-by: Kai Ji <kai.ji@intel.com>

drivers/crypto/scheduler/scheduler_pmd.c

@@ -47,7 +47,8 @@ static const char * const scheduler_valid_params[] = {
 	RTE_CRYPTODEV_VDEV_MAX_NB_QP_ARG,
 	RTE_CRYPTODEV_VDEV_SOCKET_ID,
 	RTE_CRYPTODEV_VDEV_COREMASK,
-	RTE_CRYPTODEV_VDEV_CORELIST
+	RTE_CRYPTODEV_VDEV_CORELIST,
+	NULL
 };
 
 struct scheduler_parse_map {