wip prep commit in lieu of gfx subsystem update changes.
# rename some files and constants/values for consistency and to ease cross developing on gfx drivers.
# rename graphics.hidd to gfx.hidd to make a clear distinction from graphics.library subsystem (to prevent namespace collisions) and prevent using old code with the newer apis (todo)
# expose graphics drivers as hardware devices, so that they can be enumerated by sysexplorer.
# adapt all code to use the new gfx.hidd naming.
git-svn-id: https://svn.aros.org/svn/aros/trunk/AROS@53159 fb15a70f-31f2-0310-bbcc-cdcc74a49acc