Added `CONFIG_SKALD_ADV_CHANNELS` which is then parsed to
and ordered list `SKALD_ADV_CHAN`
Co-authored-by: Leandro Lanzieri <leandro.lanzieri@haw-hamburg.de>
This changes the prefixes of the symbols generated from USEMODULE and
USEPKG variables. The changes are as follow:
KCONFIG_MODULE_ => KCONFIG_USEMODULE_
KCONFIG_PKG_ => KCONFIG_USEPKG_
MODULE_ => USEMODULE_
PKG_ => USEPKG_