docs/zh_CN: add virt index translation

Add virt to .../zh_CN/index and translate it into Chinese.
Signed-off-by: Yanteng Si <siyanteng@loongson.cn>
Reviewed-by: Alex Shi <alexs@kernel.org>
Link: https://lore.kernel.org/r/b28d3a530fe0c3635e7be2462fd14a4ae18f0220.1628212777.git.siyanteng@loongson.cnSigned-off-by: Jonathan Corbet <corbet@lwn.net>

Documentation/translations/zh_CN/index.rst

@@ -102,6 +102,7 @@ TODOList:
    iio/index
    sound/index
    filesystems/index
+   virt/index
 
 TODOList:
 
@@ -127,7 +128,6 @@ TODOList:
 * spi/index
 * w1/index
 * watchdog/index
-* virt/index
 * input/index
 * hwmon/index
 * gpu/index

Documentation/translations/zh_CN/virt/index.rst

+.. SPDX-License-Identifier: GPL-2.0
+.. include:: ../disclaimer-zh_CN.rst
+
+:Original: Documentation/virt/index.rst
+
+:翻译:
+
+ 司延腾 Yanteng Si <siyanteng@loongson.cn>
+
+:校译:
+
+ 时奎亮 Alex Shi <alexs@kernel.org>
+
+.. _cn_virt_index:
+
+===============
+Linux虚拟化支持
+===============
+
+.. toctree::
+   :maxdepth: 2
+
+TODOLIST:
+
+   kvm/index
+   uml/user_mode_linux_howto_v2
+   paravirt_ops
+   guest-halt-polling
+   ne_overview
+   acrn/index
+
+.. only:: html and subproject
+
+   Indices
+   =======
+
+   * :ref:`genindex`