[PATCH v4 3/5] doc: add features for link speeds

[Huisong Li <lihuisong@huawei.com>]

Add features for link speeds.

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

Signed-off-by: Huisong Li <lihuisong@huawei.com>
Acked-by: Chengwen Feng <fengchengwen@huawei.com>
---
 doc/guides/nics/features.rst         | 11 +++++++++++
 doc/guides/nics/features/default.ini |  1 +
 2 files changed, 12 insertions(+)

diff --git a/doc/guides/nics/features.rst b/doc/guides/nics/features.rst
index 1372ede021..3a4625f079 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
diff --git a/doc/guides/nics/features/default.ini b/doc/guides/nics/features/default.ini
index 806cb033ff..4de7d9765f 100644
--- a/doc/guides/nics/features/default.ini
+++ b/doc/guides/nics/features/default.ini
@@ -8,6 +8,7 @@
 ;
 [Features]
 Speed capabilities   =
+Link speed configuration =
 Link status          =
 Link status event    =
 Removal event        =
-- 
2.33.0