Currently target-i386.rst includes the documentation of the 'pc'
machine model inline. Split it out into its own file, in a
similar way to target-i386.rst; this gives us a place to put
documentation of other i386 machine models, such as 'microvm'.

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Alex Bennée <alex.bennee@linaro.org>
---
 docs/system/i386/pc.rst     |  7 +++++++
 docs/system/target-i386.rst | 18 +++++++++++++-----
 2 files changed, 20 insertions(+), 5 deletions(-)
 create mode 100644 docs/system/i386/pc.rst

diff --git a/docs/system/i386/pc.rst b/docs/system/i386/pc.rst
new file mode 100644
index 00000000000..d543c11a5cd
--- /dev/null
+++ b/docs/system/i386/pc.rst
@@ -0,0 +1,7 @@
+i440fx PC (``pc-i440fx``, ``pc``)
+=================================
+
+Peripherals
+~~~~~~~~~~~
+
+.. include:: ../target-i386-desc.rst.inc
diff --git a/docs/system/target-i386.rst b/docs/system/target-i386.rst
index 51be03d881f..1612ddba907 100644
--- a/docs/system/target-i386.rst
+++ b/docs/system/target-i386.rst
@@ -1,14 +1,22 @@
 .. _QEMU-PC-System-emulator:
 
-x86 (PC) System emulator
-------------------------
+x86 System emulator
+-------------------
 
 .. _pcsys_005fdevices:
 
-Peripherals
-~~~~~~~~~~~
+Board-specific documentation
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 
-.. include:: target-i386-desc.rst.inc
+..
+   This table of contents should be kept sorted alphabetically
+   by the title text of each file, which isn't the same ordering
+   as an alphabetical sort by filename.
+
+.. toctree::
+   :maxdepth: 1
+
+   i386/pc
 
 .. include:: cpu-models-x86.rst.inc
 
-- 
2.20.1