improve i350 security
We would like to use secure storage. This updates i350 tf-a to enforce security using the hardware. This currently use the MPU to secure BL31 et BL32 and enable device APC to secure the HW crypto engine (or something else since the code is not explicit and we don't have the any documentation)
Signed-off-by: Alexandre Bailon abailon@baylibre.com
Edited by Alexandre Bailon