CFG: Implemented the GetConfigInfoBlk2 function.

Added a "config" file to the CFG process service (CFG:U), and added a few default blocks to it.

Implemented GetSystemModel and GetModelNintendo2DS
Break this line up in two, one for the `copy` and another for the `fill`, using a variable. Add a comment saying "Copy string to buffer and pad with zeros." or similar.