Geode: LX framebuffer support

Based on strong urging from the Geode Linux list, I am happy to present
support for the AMD Geode LX framebuffer.  This is based on the working
patch being used as part of the One Laptop Per Child project (see the 
GIT tree here: http://dev.laptop.org/git?p=olpc-2.6;a=summary),  I just
removed the OLPC specific bits as well as the power management code which
still needs to marinate a bit in the OLPC tree.

There is still some stuff to be done here - this isn't entirely complete
by any means, but its a great start and should be generally solid for
most uses.

Thanks,
Jordan

-- 
Jordan Crouse
Senior Linux Engineer
Advanced Micro Devices, Inc.
<www.amd.com/embeddedprocessors>