Feature: Secure/Non-secure memory map

[dpretet]

Today the core allows to define memory map to create zones only some master can access. However, a master could issues requests to a slave which would allowed in secure mode, but not in non-secure.

A secure attribute should be added to a memory map along it's allowed master to define the security level. APROT will be used to determine on the fly if the access is allowed or not.