feat(imx8mm): restrict peripheral access to secure world

This restricts and locks all security relevant peripherals to only be
changeable by the secure world. Otherwise the normal world can simply
change the access settings and defeat all security measures put in
place.

Change-Id: I484a2c8164e58b68256d829470e00d5ec473e266
Signed-off-by: Stefan Kerkmann <s.kerkmann@pengutronix.de>
1 file changed