docs/zh_CN: add infiniband index translation

Translate Documentation/infiniband/index.rst into Chinese.
Signed-off-by: Yanteng Si <siyanteng@loongson.cn>
Reviewed-by: Alex Shi <alexs@kernel.org>
Reviewed-by: Puyu Wang <realpuyuwang@gmail.com>
Link: https://lore.kernel.org/r/e3bca9e59f410fe62489e36c5b9a3fab78bc1421.1628218477.git.siyanteng@loongson.cnSigned-off-by: Jonathan Corbet <corbet@lwn.net>

Documentation/translations/zh_CN/index.rst

@@ -103,6 +103,7 @@ TODOList:
    sound/index
    filesystems/index
    virt/index
+   infiniband/index
 
 TODOList:
 
@@ -117,7 +118,6 @@ TODOList:
 * hid/index
 * i2c/index
 * isdn/index
-* infiniband/index
 * leds/index
 * netlabel/index
 * networking/index

Documentation/translations/zh_CN/infiniband/index.rst

+.. SPDX-License-Identifier: GPL-2.0
+
+.. include:: ../disclaimer-zh_CN.rst
+
+:Original: Documentation/infiniband/index.rst
+
+:翻译:
+
+ 司延腾 Yanteng Si <siyanteng@loongson.cn>
+
+:校译:
+
+ 王普宇 Puyu Wang <realpuyuwang@gmail.com>
+ 时奎亮 Alex Shi <alexs@kernel.org>
+
+.. _cn_infiniband_index:
+
+==========
+infiniband
+==========
+
+.. toctree::
+   :maxdepth: 1
+
+TODOLIST:
+
+   core_locking
+   ipoib
+   opa_vnic
+   sysfs
+   tag_matching
+   user_mad
+   user_verbs
+
+.. only::  subproject and html
+
+   Indices
+   =======
+
+   * :ref:`genindex`