[dpdk-stable] please help backporting some patches to stable release 20.11.2-rc2

[Slava Ovsiienko]

Hi,

> 31625e6288  Viacheslav Ovsiienko net/mlx5: fix Tx queue doorbell record field offset
> 978a0303a3  Viacheslav Ovsiienko net/mlx5/linux: fix missed Rx packet stats

These patches are not applicable to the 20.11LTS (and to 19.11LTS) - they were sent
to stable list to be applied to 21.02.1 (if it will be ever released).

With best regards,
Slava