This reverts commit 62c15c03d39103349efc2dd862e0943244deb2e4. Fix warning: the choice symbol STM32_FLASH_CONFIG_G (defined at arch/arm/src/stm32/Kconfig:1275) is selected by the following symbols, but select/imply has no effect on choice symbols - ARCH_CHIP_STM32F412ZG (defined at arch/arm/src/stm32/Kconfig:1014)