VLAN filters don't work for FVL25

[krjoshi]

Firmware bug was suspect by Intel. However, a software fix was later discovered, and provided by Intel. This patch will be upstreamed in 1705?

[azelezniak]

DPDK patch fixed the problem.

concern is that i40e during initialization allows untagged packets on RX, also VFs without VLAN filter added able to receive VLAN with any tag ( for example driver bound to VF which is not in the config.json file will be able to receive packets with ANY VLAN ID)
workaround: to set rx_vlan_filter to VLAN 0 when VF queue is enabled but no config for the VF exists
and set "don't allow untagged"