docs/zh_CN: add PCI acpi-info translation

Translate .../PCI/acpi-info.rst into Chinese.
Add PCI into .../zh_CN/index.rst.

Signed-off-by: Yanteng Si <siyanteng@loongson.cn>
Reviewed-by: Alex Shi <alexs@kernel.org>
Reviewed-by: Wu XiangCheng <bobwxc@email.cn>
Link: https://lore.kernel.org/r/f07ba17ae9c6d728d6135ecc0577a932e9836fba.1662449105.git.siyanteng@loongson.cn


Signed-off-by: Jonathan Corbet <corbet@lwn.net>