doc: Reformat platform port documents

The platform port documents are not very standardised right now and
they don't integrate properly into the document tree so:

1) Make sure each port has a proper name and title (incl. owner)
2) Correct use of headings, subheadings, etc in each port
3) Resolve any naming conflicts between documents

Change-Id: I4c2da6f57172b7f2af3512e766ae9ce3b840b50f
Signed-off-by: Paul Beesley <paul.beesley@arm.com>
diff --git a/docs/plat/mt8183.rst b/docs/plat/mt8183.rst
index c559e19..c639be1 100644
--- a/docs/plat/mt8183.rst
+++ b/docs/plat/mt8183.rst
@@ -1,19 +1,19 @@
-Description
-===========
+MediaTek 8183
+=============
 
 MediaTek 8183 (MT8183) is a 64-bit ARM SoC introduced by MediaTek in early 2018.
 The chip incorporates eight cores - four Cortex-A53 little cores and Cortex-A73.
 Both clusters can operate at up to 2 GHz.
 
 Boot Sequence
-=============
+-------------
 
 ::
 
     Boot Rom --> Coreboot --> TF-A BL31 --> Depthcharge --> Linux Kernel
 
 How to Build
-============
+------------
 
 .. code:: shell