drivers: flash: MCUX: Split the relocate define based on target memory
drivers: flash: MCUX: Split the relocate define based on target memory

Use the CODE_DATA_RELOCATION_SRAM config to indentify code relocated
to SRAM so we can setup the MPU for the SRAM region used for code
relocation.

Signed-off-by: Mahesh Mahadevan <7f315ec3481825d543f8bec256ad86a4adc9dd8a@nxp.com>

finikorg/zephyr,galak/zephyr,zephyrproject-rtos/zephyr,zephyrproject-rtos/zephyr,finikorg/zephyr,galak/zephyr,finikorg/zephyr,galak/zephyr,galak/zephyr,zephyrproject-rtos/zephyr,finikorg/zephyr,zephyrproject-rtos/zephyr,finikorg/zephyr,zephyrproject-rtos/zephyr,galak/zephyr