NolwennV created T806: Disabling non secure MPU for stm35l5 platforms.

NolwennV renamed T804: Modify post build and flash scripts for stm32l5 platforms from Modify post build script for stm32l5 platforms to Modify post build and flash scripts for stm32l5 platforms.

NolwennV created T804: Modify post build and flash scripts for stm32l5 platforms.