[ECOS] FIFO support in CDL for 16x5x

[David Airlie]

Hi,
	Attached is a patch to add basic FIFO RX support to the 16x5x
driver via CDL, it just adds an option to the 16x5x driver to set a FIFO
RX threshold of 1,4,8, or 14 bytes, 

The default case is to use the single byte so it shouldn't affect any
existing systems..

Dave.

-- 
      David Airlie, Software Engineer, Parthus Technologies plc.,
       Mary Rosse Centre, National Tech Park, Limerick, Ireland.
   t: +353-61-508116 / f: +353-61-508101 / David.Airlie@parthus.com