Some work on the Voodoo Graphics emulation (Voodoo2 still not detected)
- assign the correct register access map for the Voodoo2 model
- improved debug and error message output
- minor coding style changes


git-svn-id: svn://svn.code.sf.net/p/bochs/code/trunk@12064 6c8e4198-a580-4521-a02f-c9ae86df1db9