The STM32_ARM_MPU_ENABLE option is just selecting ARM_MPU option,
which could be also controlled through menuconfig.
This commit removes the STM32_ARM_MPU_ENABLE option and replaces
its usage by ARM_MPU option.
Signed-off-by: Piotr Zięcik <piotr.ziecik@nordicsemi.no>
Move the SoC outside of the architecture tree and put them at the same
level as boards and architectures allowing both SoCs and boards to be
maintained outside the tree.
Signed-off-by: Anas Nashif <anas.nashif@intel.com>