Overview:
I am trying to make use of DPDK with an XXV710 VF using SR-IOV on a vSphere VM, however I am finding that with DPDK 20.11 that I am unable to transmit any packets in my application. When running testpmd I find that there are no packets transmitted and the tx-error stat just keeps getting incremented when a packet is transmitted.

I did some further testing of different DPDK versions and found that the following commit is the one that stopped these cards working in a vSphere VM:

https://github.com/DPDK/dpdk/commit/34283fc94847f237677edd5909639503c605daeb

When I revert this commit I find that i40e VFs on vSphere do work with DPDK 20.11.

Steps to Reproduce:
This can be reproduced with the following steps:
- Add an XXV710 VF SR-IOV interface to a vSphere VM
- Use testpmd to transmit packets on the vSphere VM (I used `testpmd -l 2,4,6 -- --stats-period=5 --forward-mode=mac --port-topology=loop`)

Actual Results:
The tx-error stats are incremented and no packets are transmitted.

Expected Results:
The packets should be transmitted.