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_
This changes the configuration macro to be the exponent of 2^n, as the message queue size needs to be always power of 2.
