i.MX: HABv4: implement interface for i.MX8MQ ...

The HAB interface for i.MX8MQ only implements the retrieval of status
and events. The SoC status is retrieved using the TF-A SIP API found in
the downstream imx TF-A. After calling into the TF-A the passed data
structures need to be invalidated, since otherwise the cached zero value
is used.
Currently the TF-A report event call only supports FAILURE events.
Testing the TF-A with other event types resulted in a freeze in the
bootrom code, which was not investigated further.
We instead walk the memory containing the events and retrieve the events
ourselves. They are exposed using the same API.

Signed-off-by: Rouven Czerwinski <r.czerwinski@pengutronix.de>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

HAB: fuse recommended OCOTP_DIR_BT_DIS ...

This is now recommended for all systems. Especially for the HAB usecase
disallowing alternative boot selection after WDOG reset is essential.

Signed-off-by: Bastian Stender <bst@pengutronix.de>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

HAB: don't reference unused HAB ops ...

Signed-off-by: Lucas Stach <l.stach@pengutronix.de>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

i.MX: hab: Add HAB fusebox related convenience functions / command ...

Secure boot with HAB requires handling of the super root key hash
and actually locking down the device. The related information is
stored in the i.MX fusebox device (IIM on older SoCs, OCOTP on newer
SoCs). This patch adds several convenience functions to store and
read the super root key hash and to lock down a SoC. Also we add
a command to do this from the command line.

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
Signed-off-by: Oleksij Rempel <o.rempel@pengutronix.de>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>