common/cnxk: fix QinQ ROC item mismatch

common/cnxk: fix QinQ ROC item mismatch

ROC code is assuming presence of vlan extension headers in
case of QinQ, because of this, there is incompatibility
between the driver and ROC. Fixed this in ROC by treating
QINQ as multiple VLAN pattern items for DPDK (as opposed to
treating QINQ as separate pattern item).

Fixes: b8ac8b089ce ("common/cnxk: support matching VLAN existence")
Cc: stable@dpdk.org
Signed-off-by: Satheesh Paul <psatheesh@marvell.com>
Acked-by: Jerin Jacob <jerinj@marvell.com>