Fixed clipping of device address maps if the size of the map caused the end address to wrap. Added a proof of concept implementation of a address map bank device, which allows you to bank memory maps. Hooked it up to Taito GNET as an example [smf]

git-svn-id: svn://dspnet.fr/mame/trunk@23322 749742ba-7341-0410-aadc-df50b521781e