vhost: fix packed ring dequeue offloading
vhost: fix packed ring dequeue offloading

When vhost is doing dequeue offloading, it parses ethernet and L3/L4
headers of the packet. Then vhost will set corresponding value in mbuf
attributes. It means offloading action should be after packet data copy.

Fixes: 75ed51697820 ("vhost: add packed ring batch dequeue")
Cc: stable@dpdk.org

Signed-off-by: Marvin Liu <d89ea4150d91f674af88bbc382d184dd42ea906c@intel.com>
Reviewed-by: Maxime Coquelin <9a2667dee3b90866bbc9c2696cff2b7d5616c95a@redhat.com>

john-mcnamara-intel/dpdk,john-mcnamara-intel/dpdk,john-mcnamara-intel/dpdk,john-mcnamara-intel/dpdk