doc: fix the release notes for Mellanox PMD

  The mlx5 PMD might not work on Power 9 platform with OFED
version 5.1-0.6.6.0 (latest GA release at the moment).
Release notes know issues chapter is updated accordingly,
workaround is proposed.

Fixes: 544f35c334e5 ("doc: add tested platforms with Mellanox NICs")

Signed-off-by: Viacheslav Ovsiienko <viacheslavo@mellanox.com>
---
 doc/guides/rel_notes/release_20_08.rst | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)
  

06/08/2020 17:49, Viacheslav Ovsiienko:
> The mlx5 PMD might not work on Power 9 platform with OFED
> version 5.1-0.6.6.0 (latest GA release at the moment).
> Release notes know issues chapter is updated accordingly,
> workaround is proposed.
> 
> Fixes: 544f35c334e5 ("doc: add tested platforms with Mellanox NICs")
> 
> Signed-off-by: Viacheslav Ovsiienko <viacheslavo@mellanox.com>
> ---
>  doc/guides/rel_notes/release_20_08.rst | 7 ++++++-
>  1 file changed, 6 insertions(+), 1 deletion(-)
> 
> diff --git a/doc/guides/rel_notes/release_20_08.rst b/doc/guides/rel_notes/release_20_08.rst
> index 9761f5a..147a380 100644
> --- a/doc/guides/rel_notes/release_20_08.rst
> +++ b/doc/guides/rel_notes/release_20_08.rst
> @@ -331,6 +331,11 @@ Known Issues
>     Also, make sure to start the actual text at the margin.

Please see above. Indent is wrong.

>     =========================================================
>  
> +   * **mlx5 PMD might not work on Power 9 with OFED 5.1-0.6.6.0.**

Just to confirm, "might" means it works sometimes.
Matter of luck?

> +
> +     Consider using the newer OFED releases, the previous
> +     OFED 5.0-2.1.8.0, or upstream rdma-core library v29 and above.
> +
>  
>  Tested Platforms
>  ----------------
> @@ -489,4 +494,4 @@ Tested Platforms
>  
>    * OFED:
>  
> -    * MLNX_OFED 5.1-0.6.6.0
> +    * MLNX_OFED 5.0-2.1.8.0