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Move almost all system include files to a logical sub-directory
under ./include. The only remaining system include directories
not under ./include are specific to the platform. Move the
corresponding source files to match the include directory
structure.

Also remove pm.h as it is no longer used.

Change-Id: Ie5ea6368ec5fad459f3e8a802ad129135527f0b3

The TZC-400 performs security checks on transactions to memory or
peripherals. Separate regions can be created in the address space each
with individual security settings.

Limitations:
This driver does not currently support raising an interrupt on access
violation.

Change-Id: Idf8ed64b4d8d218fc9b6f9d75acdb2cd441d2449