CPU architectures support in T2

As T2 comes with a sophisticated build system with support for cross compiling including the bootstrap of a cross toolchain it is fairly easy to use T2 to build or port to new architectures.

The various T2 contributors have different needs ranging from embedded devices over normal end-user workstations, e.g. for office use, and server systems including high-performance-cluster systems. T2 includes support for an equally wide range of CPU architectures - from the tiniest system on a chip modules to multi CPU enterprise servers.