net/iavf: fix VLAN offload

[ upstream commit 5cbfb38 ]

HW VLAN offload cannot be enabled because the HW capability flags
are not set correctly.

Fixes: eff56a7 ("net/iavf: add offload path for Rx AVX512")

Signed-off-by: Wenzhuo Lu <wenzhuo.lu@intel.com>
Acked-by: Qi Zhang <qi.z.zhang@intel.com>

drivers/net/iavf/iavf_ethdev.c

@@ -1094,6 +1094,7 @@ iavf_dev_info_get(struct rte_eth_dev *dev, struct rte_eth_dev_info *dev_info)
 		RTE_ETH_RX_OFFLOAD_OUTER_IPV4_CKSUM |
 		RTE_ETH_RX_OFFLOAD_SCATTER |
 		RTE_ETH_RX_OFFLOAD_VLAN_FILTER |
+		RTE_ETH_RX_OFFLOAD_VLAN_EXTEND |
 		RTE_ETH_RX_OFFLOAD_RSS_HASH;
 
 	dev_info->tx_offload_capa =