octeontx2-af: Support for VTAG strip and capture

Added support for PF/VF drivers to configure NIX to
capture and/or strip VLAN tag from ingress packets.

Signed-off-by: Vamsi Attunuru <vamsi.attunuru@marvell.com>
Signed-off-by: Sunil Goutham <sgoutham@marvell.com>
Signed-off-by: David S. Miller <davem@davemloft.net>