[PATCH v3 3/6] doc: add features for link speeds

[Huisong Li]

Add features for link speeds.

Fixes: 82113036e4e5 ("ethdev: redesign link speed config")
Cc: stable at dpdk.org

Signed-off-by: Huisong Li <lihuisong at huawei.com>
Acked-by: Chengwen Feng <fengchengwen at huawei.com>
---
 doc/guides/nics/features.rst | 11 +++++++++++
 1 file changed, 11 insertions(+)

diff --git a/doc/guides/nics/features.rst b/doc/guides/nics/features.rst
index f14962a6c3..d13e43ae81 100644
--- a/doc/guides/nics/features.rst
+++ b/doc/guides/nics/features.rst
@@ -34,6 +34,17 @@ Supports getting the speed capabilities that the current device is capable of.
 * **[related]  API**: ``rte_eth_dev_info_get()``.
 
 
+.. _nic_features_link_speeds_config:
+
+Link speed configuration
+------------------------
+
+Supports configurating fixed speed and link autonegotiation.
+
+* **[uses]     user config**: ``dev_conf.link_speeds:RTE_ETH_LINK_SPEED_*``.
+* **[related]  API**: ``rte_eth_dev_configure()``.
+
+
 .. _nic_features_link_status:
 
 Link status
-- 
2.33.0