Kconfig updates

[krichardsson]

This PR fixes some issues in the Kconfig setup found in #1054

[krichardsson]

For the estimator and controller settings the changes are pretty straight forward, simply set the appropriate estimator or controller config to y in the default config files. For instance

CONFIG_ESTIMATOR_ANY=y

If the kalman estimator is required, one would use

CONFIG_ESTIMATOR_KALMAN=y

[krichardsson]

The deck force parameter requires double quoting, for instance

CONFIG_DECK_FORCE="bcDWM1000:myOtherDeck"

[krichardsson]

I changed the power distribution a bit. I could not figure out a way to use kbuild in a similar way as we did earlier (with a config the names the file to use in the build). Instead I added a power distribution choice to the configuration that only contains the normal quad power distribution. If someone wants a new power distribution for a new platform, a new option can be added to the choice that is used to build the correct file. The setup is documented in the docs files.

[tobbeanton]

Nothing to comment on really, looks nice and good with some CF1 cleanup!