Trim the arch mmu unit tests accordingly.
Should probably switch this to a #define, but it's possible some of
these queries could be dynamically detected (XN for example). May
revisit at some point.
Allow asking the arch layer if it supports NX pages or NS pages.
Have the arch mmu test code test accordingly.
Also tweak the tests to pass on arm32 mmu, which does not precisely
match the return semantics of the rest of the mmu routines on map/unmap.
This lets some arches return a 64bit counter.
As a result of fixing this, removed -Wno-format switch in the test app
which caused the need to fix a lot of printfs.
Now you need to include arch/atomic.h to get to the atomic routines.
This simplifies a recusion issue in the way arch/ops.h included
arch_ops. Also just generally makes things cleaner.
Examples are include/platform.h -> platform/include/platform.h
include/target.h -> target/include/target.h
The old model generally considered these to be Always There includes,
but they're starting to stick out more and more so may as well actually
follow the model that most of the rest of the system follows.
