Zephyr: Rename NXP MPU preprocessor defines #2332
Description
Zephyr 4.1 changes CONFIG_CPU_HAS_NXP_MPU to CONFIG_CPU_HAS_NXP_SYSMPU. This needs to be reflected in the Zephyr MCUBoot code.
See https://docs.zephyrproject.org/latest/releases/migration-guide-4.1.html#mmu-mpu