arm: Add more flash and ram size options to i.MX RT MPU config
arm: Add more flash and ram size options to i.MX RT MPU config

Adds 8 MB and 64 MB flash size options, which correspond to the two
external flashes (qspi flash and hyperflash) on the mimxrt1050_evk
board. Adds a 32 MB SRAM size option, which corresponds to the external
sdram on the board.

Signed-off-by: Maureen Helm <87a696db5547fa477bda9f9e0f00013c839c14d3@nxp.com>

kraj/zephyr,finikorg/zephyr,GiulianoFranchetto/zephyr,kraj/zephyr,explora26/zephyr,finikorg/zephyr,explora26/zephyr,nashif/zephyr,GiulianoFranchetto/zephyr,punitvara/zephyr,galak/zephyr,punitvara/zephyr,Vudentz/zephyr,ldts/zephyr,ldts/zephyr,kraj/zephyr,zephyrproject-rtos/zephyr,galak/zephyr,galak/zephyr,kraj/zephyr,ldts/zephyr,zephyrproject-rtos/zephyr,zephyrproject-rtos/zephyr,nashif/zephyr,explora26/zephyr,explora26/zephyr,finikorg/zephyr,zephyriot/zephyr,punitvara/zephyr,finikorg/zephyr,zephyrproject-rtos/zephyr,zephyriot/zephyr,Vudentz/zephyr,galak/zephyr,Vudentz/zephyr,nashif/zephyr,mbolivar/zephyr,kraj/zephyr,zephyriot/zephyr,zephyriot/zephyr,zephyrproject-rtos/zephyr,mbolivar/zephyr,ldts/zephyr,explora26/zephyr,finikorg/zephyr,ldts/zephyr,mbolivar/zephyr,GiulianoFranchetto/zephyr,punitvara/zephyr,Vudentz/zephyr,mbolivar/zephyr,galak/zephyr,Vudentz/zephyr,Vudentz/zephyr,mbolivar/zephyr,nashif/zephyr,zephyriot/zephyr,GiulianoFranchetto/zephyr,punitvara/zephyr,nashif/zephyr,GiulianoFranchetto/zephyr