This patch adds the basic support for the i.MX23/i.MX28 architecture. These CPUs are branded with i.MX but they are mostly of type STMP378X from SigmaTel. So, they do not share most of their internal devices with the other i.MX CPUs. That's why I open a new sub architecture 'mach-stm'. Comments are welcome. Regards, Juergen