[PATCH] doc: add deprecation notice for kni example

[Bruce Richardson]

As agreed by DPDK Technical Board, the KNI example app is due to be
removed from the repository to discourage use in future projects, given
that better alternatives exist.

Signed-off-by: Bruce Richardson <bruce.richardson at intel.com>
---
 doc/guides/rel_notes/deprecation.rst | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/doc/guides/rel_notes/deprecation.rst b/doc/guides/rel_notes/deprecation.rst
index 4e5b23c53d..ee36fc684d 100644
--- a/doc/guides/rel_notes/deprecation.rst
+++ b/doc/guides/rel_notes/deprecation.rst
@@ -125,3 +125,7 @@ Deprecation Notices
   applications should be updated to use the ``dmadev`` library instead,
   with the underlying HW-functionality being provided by the ``ioat`` or
   ``idxd`` dma drivers
+
+* examples/kni: The ``kni`` kernel module and library are not recommended for use by new applications -
+  other technologies such as virtio-user are recommended instead.
+  Because of this, the example application for kni is deprecated and will be removed in a future release.
-- 
2.34.1