please help backporting some patches to stable release 20.11.6

[Zhou, YidingX]

Hi,  Xueming

No need to backport the following 2 patches, thanks.

> 755fd7b22d  Wenxuan Wu       net/iavf: fix GTP-U extension flow
> 196f35f81c  Yiding Zhou      net/iavf: fix VF reset


/Yiding