i40e/base: avoid unwanted Tx traffic mirroring

i40e/base: avoid unwanted Tx traffic mirroring

In Multi-Function Mode (MFP) particularly when the PF VSI is set
in limited promiscuous mode, the HW switch was still mirroring the
outgoing packets from other VSIs (VF/VMdq) onto the PF VSI.

This sets a new bit to avoid above mirroring, and it is in limited
promiscuous on the PF VSI in MFP which is similar to default port
VSI.

Signed-off-by: Helin Zhang <helin.zhang@intel.com>
Acked-by: Jingjing Wu <jingjing.wu@intel.com>
Acked-by: Remy Horton <remy.horton@intel.com>