* evergreen headers are split due to different
header copyrights
* detect and set up evergreen memory controler
* change the way we manage radeon chipsets to
more closely match drm driver as the chipset
model numbers aren't in order and change from
numbers to names.
* check for evergreen when populating frame buffer
information.
* style cleanup
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@43225 a95241bf-73f2-0310-859d-f6bbb57e9c96
