Translate page_tables.rst to Simplified Chinese.

Fix a mistake for pfn value in mm/page_tables.rst.

Synchronize the changes of origin document to fix the pfn value.

Pengyu Zhang (3):
  Docs/zh_CN: Translate page_tables.rst to Simplified Chinese
  Docs/mm: Fix a mistake for pfn in page_tables.rst
  Docs/zh_CN: Fix the pfn calculation error in page_tables.rst

 Documentation/mm/page_tables.rst              |   2 +-
 Documentation/translations/zh_CN/mm/index.rst |   1 +
 .../translations/zh_CN/mm/page_tables.rst     | 221 ++++++++++++++++++
 3 files changed, 223 insertions(+), 1 deletion(-)
 create mode 100644 Documentation/translations/zh_CN/mm/page_tables.rst

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2.25.1