This applies only to `ARM_MUSCA_B1` target
When MCUBOOT repo: UPSTREAM was set as default as part of TF-M 1.1
release, few things were changed:
MCUBOOT_IMAGE_NUMBER: '2'
MCUBOOT_UPGRADE_STRATEGY: 'OVERWRITE_ONLY'
MCUBOOT_HW_KEY: 'On'(default)
Therefore the signing strategy for Non-secure image (Mbed OS)
needs to be done with its own private key, which is validated during
boot.
Signed-off-by: Vikas Katariya <vikas.katariya@arm.com>
Vikas Katariya