smsc_ece1099.txt: standardize document format

Each text file under Documentation follows a different
format. Some doesn't even have titles!

Change its representation to follow the adopted standard,
using ReST markups for it to be parseable by Sphinx:

- Add a title for the document.
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
Signed-off-by: Jonathan Corbet <corbet@lwn.net>

Documentation/smsc_ece1099.txt

+=================================================
+Msc Keyboard Scan Expansion/GPIO Expansion device
+=================================================
+
 What is smsc-ece1099?
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