This wrapper lives in a seperate module and class so that possible
processing of arguments can be done before the config dictionary
gets passed to the compiler.
By using a dictionary, it will be easier to mix & match the RTL
order dependend on the properties of the field.
This commit also adds anded/ored/xored properties.
The compiler in this commit is still useless and only contains a
very rough skeleton of the code. SRDL2SV is only able to
create a simple register with hw=rw/sw=rw fields.
