Updated 6809 to v0.24 (14th Dec 2014); increased config clock to 25

Change-Id: I057e64272a001f2b2bf9908b6f0b73aa6097982c
Updated config clock to 25; updated Z80 client code to v1.21

Change-Id: I5d22da851d246ff44a78c8433aef2f9f50528cbc