boot: zephyr: socs: stm32h7s3xx: Add support for ext_flash_app variant#2554

TD-JBL wants to merge 1 commit intomcu-tools:mainmcu-tools/mcuboot:mainfrom

JB-Lighting:dev_h7s3_ext_app_flashJB-Lighting/mcuboot:dev_h7s3_ext_app_flashCopy head branch name to clipboard