boards: stm32l562e_dk: Enable TF-M IPC application

This commit enables the TF-M IPC sample application on stm32l562e_dk
board.
It provides device tree flash partition as an overlay in order to
configure and flash the bl2, secure/non secure firmwares.

Signed-off-by: Yestin Sun <sunyi0804@gmail.com>
4 files changed