DPDK: fix KNI kernel crash for indirect mbufs
DPDK: fix KNI kernel crash for indirect mbufs

Change-Id: Ifc88d03049928aa3d5717d054abe3856d54327a8
Closes-bug: #1538201

codilime/contrail-vrouter,codilime/contrail-vrouter,codilime/contrail-vrouter,codilime/contrail-vrouter