[PATCH v5 3/3] doc: announce change to LLDP packet detection in iavf PMD

[Ciara Loftus <ciara.loftus@intel.com>]

The iavf PMD transmit paths currently use two methods to
identify if an mbuf holds an LLDP packet: a dynamic mbuf
field and the mbuf ptype. The ptype method is enabled via
the enable_ptype_lldp devarg. A future release will remove
the dynamic mbuf field approach at which point the ptype
will be the only approach used.

Signed-off-by: Ciara Loftus <ciara.loftus@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 35c9b4e06c..17f90a6352 100644
--- a/doc/guides/rel_notes/deprecation.rst
+++ b/doc/guides/rel_notes/deprecation.rst
@@ -154,3 +154,7 @@ Deprecation Notices
 * bus/vmbus: Starting DPDK 25.11, all the vmbus API defined in
   ``drivers/bus/vmbus/rte_bus_vmbus.h`` will become internal to DPDK.
   Those API functions are used internally by DPDK core and netvsc PMD.
+
+* net/iavf: The dynamic mbuf field used to detect LLDP packets on the
+  transmit path in the iavf PMD will be removed in a future release.
+  After removal, only packet type-based detection will be supported.
-- 
2.43.0