docs/zh_CN: core-api: Add this_cpu_ops Chinese translation

docs/zh_CN: core-api: Add this_cpu_ops Chinese translation

Translate core-api/this_cpu_ops.rst into Chinese.

Last English version used:

commit c9b54d6f362c ("docs: move other kAPI documents to core-api").

Signed-off-by: Binbin Zhou <zhoubinbin@loongson.cn>
Reviewed-by: Wu XiangCheng <bobwxc@email.cn>
Reviewed-by: Yanteng Si <siyanteng@loongson.cn>
Link: https://lore.kernel.org/r/f9a8cb188bc35811d7f074f9d5f607f5a48c6503.1666171735.git.zhoubinbin@loongson.cn
Signed-off-by: Jonathan Corbet <corbet@lwn.net>