Announce adding 'RTE_ETH_' prefix to all public ethdev macros/enums on
v21.11.
Backward compatibility macros will be added on v21.11 and they will be
removed on v22.11.

Signed-off-by: Ferruh Yigit <redacted>
---
Cc: Andrew Rybchenko <redacted>
Cc: Thomas Monjalon <redacted>
Cc: David Marchand <redacted>
Cc: Qi Z Zhang <redacted>
Cc: Raslan Darawsheh <redacted>
Cc: Ajit Khaparde <ajit.khaparde@broadcom.com>
Cc: Jerin Jacob Kollanukkaran <redacted>
---
  doc/guides/rel_notes/deprecation.rst | 5 +++++
  1 file changed, 5 insertions(+)

diff --git a/doc/guides/rel_notes/deprecation.rst b/doc/guides/rel_notes/deprecation.rst
index 9584d6bfd723..ae79673e37e3 100644
--- a/doc/guides/rel_notes/deprecation.rst
+++ b/doc/guides/rel_notes/deprecation.rst

@@ -118,6 +118,11 @@ Deprecation Notices
    consistent with existing outer header checksum status flag naming, which
    should help in reducing confusion about its usage.
  
+* ethdev: Will add 'RTE_ETH_' prefix to all ethdev macros/enums in v21.11. Macros
+  will be added for backward compatibility. Backward compatibility macros will be
+  removed on v22.11. A few old backward compatibility macros from 2013 that does
+  not have proper prefix will be removed on v21.11.
+
  * i40e: As there are both i40evf and iavf pmd, the functions of them are
    duplicated. And now more and more advanced features are developed on iavf.
    To keep consistent with kernel driver's name