cmake: mcuboot: Flash encrypted image when loading to RAM

When both `SB_CONFIG_MCUBOOT_MODE_RAM_LOAD` and `SB_CONFIG_BOOT_ENCRYPTION`
are enabled, MCUBoot loads an encrypted image from flash, decrypts it,
and then executes it from RAM.

Previously, the unencrypted image was being flashed. This caused a boot
failure because MCUBoot would attempt to decrypt an unencrypted image.

This commit ensures the encrypted image is flashed when this
configuration is active, allowing the system to boot correctly.

Signed-off-by: Arthur Gay <arthur.gay@marshmallow.kids>

Author: arthur-mmlw

cmake/mcuboot.cmake

@@ -283,6 +283,9 @@ function(zephyr_mcuboot_tasks)
       set_property(GLOBAL APPEND PROPERTY extra_post_build_commands COMMAND
                    ${imgtool_sign} ${imgtool_args} --encrypt "${keyfile_enc}" ${output}.hex
                    ${output}.signed.encrypted.hex)
+      if(CONFIG_MCUBOOT_BOOTLOADER_MODE_RAM_LOAD)
+        zephyr_runner_file(hex ${output}.signed.encrypted.hex)
+      endif()
     endif()
 
     if(CONFIG_MCUBOOT_BOOTLOADER_MODE_RAM_LOAD OR CONFIG_MCUBOOT_BOOTLOADER_MODE_RAM_LOAD_WITH_REVERT)