Fix debug module parameterization

Created by: zarubaf

The debug module address was hard-coded which leads to a mismatch with a newer version of the debug module (since this commit https://github.com/pulp-platform/riscv-dbg/commit/55cda4b8043f4bdd609b188860ea115cc14499bb).

To avoid that in the future and to avoid dependencies on the debug module the debug module addresses can be passed as a parameter of CVA6Cfg now. I've also moved the ariane_dm_pkg constants into ariane_pkg to get rid of this module.