docs/zh_CN: core-api: Add generic-radix-tree Chinese translation

Translate core-api/generic-radix-tree.rst into Chinese.

Last English version used:

commit ba20ba2e ("generic radix trees").
Signed-off-by: Binbin Zhou <zhoubinbin@loongson.cn>
Reviewed-by: Wu XiangCheng <bobwxc@email.cn>
Reviewed-by: Yanteng Si<siyanteng@loongson.cn>
Reviewed-by: Alex Shi <alexs@kernel.org>
Link: https://lore.kernel.org/r/aad94e2a053ae021eb4d63240690b05c2f3e8dec.1660881950.git.zhoubinbin@loongson.cnSigned-off-by: Jonathan Corbet <corbet@lwn.net>

Documentation/translations/zh_CN/core-api/generic-radix-tree.rst

+.. SPDX-License-Identifier: GPL-2.0+
+
+.. include:: ../disclaimer-zh_CN.rst
+
+:Original: Documentation/core-api/generic-radix-tree.rst
+
+:翻译:
+
+ 周彬彬 Binbin Zhou <zhoubinbin@loongson.cn>
+
+===================
+通用基数树/稀疏数组
+===================
+
+通用基数树/稀疏数组的相关内容请见include/linux/generic-radix-tree.h文件中的
+“DOC: Generic radix trees/sparse arrays”。
+
+通用基数树函数
+--------------
+
+该API在以下内核代码中:
+
+include/linux/generic-radix-tree.h

Documentation/translations/zh_CN/core-api/index.rst

@@ -46,12 +46,12 @@
    rbtree
    idr
    circular-buffers
+   generic-radix-tree
 
 Todolist:
 
 
 
-   generic-radix-tree
    packing
    this_cpu_ops
    timekeeping