doc/zh_CN: mips: use doc references instead

The Chinese mips translations refer to non-existing labels in the original
documentation. Hence, make htmldocs warns about those undefined labels on
all files in ./Documentation/translations/zh_CN/mips/.

Replace the references to non-existing labels with suitable doc references.
Signed-off-by: Lukas Bulwahn <lukas.bulwahn@gmail.com>
Fixes: 419b1d4e ("doc/zh_CN: add mips ingenic-tcu.rst translation")
Fixes: 72bc9d08 ("doc/zh_CN: add mips features.rst translation")
Fixes: 7fd3954b ("doc/zh_CN: add mips booting.rst translation")
Fixes: b8e724fd ("doc/zh_CN: add mips index.rst translation")
Reported-by: Stephen Rothwell <sfr@canb.auug.org.au>
Link: https://lore.kernel.org/r/20210113070557.28792-1-lukas.bulwahn@gmail.comSigned-off-by: Jonathan Corbet <corbet@lwn.net>

Documentation/translations/zh_CN/mips/booting.rst

@@ -2,7 +2,7 @@
 
 .. include:: ../disclaimer-zh_CN.rst
 
-:Original: :ref:`Documentation/mips/booting.rst <booting>`
+:Original: :doc:`../../../mips/booting`
 :Translator: Yanteng Si <siyanteng@loongson.cn>
 
 .. _cn_booting:

Documentation/translations/zh_CN/mips/features.rst

@@ -2,7 +2,7 @@
 
 .. include:: ../disclaimer-zh_CN.rst
 
-:Original: :ref:`Documentation/mips/features.rst <features>`
+:Original: :doc:`../../../mips/features`
 :Translator: Yanteng Si <siyanteng@loongson.cn>
 
 .. _cn_features:

Documentation/translations/zh_CN/mips/index.rst

@@ -2,7 +2,7 @@
 
 .. include:: ../disclaimer-zh_CN.rst
 
-:Original: :ref:`Documentation/mips/index.rst <index>`
+:Original: :doc:`../../../mips/index`
 :Translator: Yanteng Si <siyanteng@loongson.cn>
 
 .. _cn_index:

Documentation/translations/zh_CN/mips/ingenic-tcu.rst

@@ -2,7 +2,7 @@
 
 .. include:: ../disclaimer-zh_CN.rst
 
-:Original: :ref:`Documentation/mips/ingenic-tcu.rst <ingenic-tcu>`
+:Original: :doc:`../../../mips/ingenic-tcu`
 :Translator: Yanteng Si <siyanteng@loongson.cn>
 
 .. _cn_ingenic-tcu: