doc: fix release notes for mlx5 dependency

The mlx5 PMD does not work on Power 9 platform with OFED
version 5.1-0.6.6.0 (latest GA release at the moment).
Release notes known 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>
Acked-by: Asaf Penso <asafp@mellanox.com>

diff --git a/doc/guides/rel_notes/release_20_08.rst b/doc/guides/rel_notes/release_20_08.rst
index 9761f5a..3b29aef 100644 (file)
--- 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.
    =========================================================
 
+* **mlx5 PMD does not work on Power 9 with OFED 5.1-0.6.6.0.**
+
+  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