This is useful for consolidation of code-signing interfaces when
building an image with verified boot mechanisms or signed update
artifacts. It can also be used on the target as a backend for software
which uses the PKCS#11 API to access private key material.
Signed-off-by: Jan Luebbe <jlu@pengutronix.de>
Signed-off-by: Khem Raj <raj.khem@gmail.com>