[PATCH v9 07/21] net/txgbe: fix Tx desc free logic

[Zaiyu Wang]

> This will fail build on clang since txq->headwb_mem is declared as volatile not _Atomic
type.
> 
> Please fix, and resubmit both patch series.

Hi Stephen,

Thank you for pointing this out. I apologize for the oversight - I failed to pay proper
attention to the failure from ci/github-robot: build, and mistakenly focused only on the
ci/Intel-compilation and others.

This error has been fixed in v10. Additionally, the unprefixed symbols that did not meet
the naming conventions have been renamed with the txgbe_ prefix.

Our other patch series will be resubmitted later. The code for VF sensing PF down differs
from our OOT driver, and its functionality requires further validation before submission.