Kconfig configuration exposure list

Dear RIOTers,

As part of the first phase towards the integration of Kconfig in RIOT, a tracking list has been created [1]. In that issue we want to keep track of the progress of configuration exposure (to Kconfig) for the different modules in RIOT. Currently most of the listed modules are the ones which have identified configuration options in Doxygen. In [2] we are tracking which options have already been identified and which may still need to be added to the Doxygen 'config' group.

There are already some PRs out there exposing parameters to Kconfig. All help doing so for other modules is really appreciated.

Cheers, Leandro.

[1]: https://github.com/RIOT-OS/RIOT/issues/12888 [2]: https://github.com/RIOT-OS/RIOT/issues/10566