Rewrite of the MS busmouse support to make it work with DOS and Win95 drivers.
The device exists for some years now, but it was never functional and it is not
yet mentioned in the docs. After studying Linux kernel sources and a lot of
tests it is now usable. A configure option doesn't exist, so it must be enabled
in config.h. At runtime it is only loaded if the mouse type is set to 'bus'.


git-svn-id: svn://svn.code.sf.net/p/bochs/code/trunk@12073 6c8e4198-a580-4521-a02f-c9ae86df1db9