config: Pair MODULE_UNLOAD with MODULES

If we have loadable modules we probably want the ability to
unload them as well. It certainly isn't just a vexpress requirement
as it stood before this change.

Signed-off-by: Jon Medhurst <tixy@linaro.org>
Signed-off-by: John Stultz <john.stultz@linaro.org>
2 files changed