[RIVA FBDEV] Driver now uses its own fb_open and fb_release function again. It has no ill effects. The drivers uses strickly hardware acceleration so we don't need cfb_fillrect and cfb_copyarea.
Cleaned up font.h. Geerts orignal pacth broke them up into a font.h in video and one in  linux. Now I put them back together again in include/linux. The m68k platform has been updated for this change.