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Even though both CCI-400 and CCI-500 IPs have different configurations
with respect to the number and types of supported interfaces, their
register offsets and programming sequences are similar. This patch
creates a common driver for enabling and disabling snoop transactions
and DVMs with both the IPs.

New platform ports which implement one of these IPs should use this
common driver. Existing platform ports which implement CCI-400 should
migrate to the common driver as the standalone CCI-400 will be
deprecated in the future.

Change-Id: I3ccd0eb7b062922d2e4a374ff8c21e79fa357556

* Create cci_init() function in CCI-400 driver to allow platform
  to provide arguments needed by the driver (i.e. base address
  and cluster indices for the ACE slave interfaces).

* Rename cci_(en|dis)able_coherency to
  cci_(en|dis)able_cluster_coherency to make it clear that
  the driver only enables/disables the coherency of CPU
  clusters and not other devices connected to the CCI-400.

* Update FVP port to use new cci_init() function and remove
  unnecessary CCI defintions from platform_def.h. Also rename
  fvp_cci_setup() to fvp_cci_enable() to more clearly
  differentiate between CCI initialization and enabling.

THIS CHANGE REQUIRES PLATFORM PORTS THAT USE THE CCI-400 DRIVER
TO BE UPDATED

Fixes ARM-software/tf-issues#168

Change-Id: I1946a51409b91217b92285b6375082619f607fec

Previously, platform.h contained many declarations and definitions
used for different purposes. This file has been split so that:

* Platform definitions used by common code that must be defined
  by the platform are now in platform_def.h. The exact include
  path is exported through $PLAT_INCLUDES in the platform makefile.

* Platform definitions specific to the FVP platform are now in
  /plat/fvp/fvp_def.h.

* Platform API declarations specific to the FVP platform are now
  in /plat/fvp/fvp_private.h.

* The remaining platform API declarations that must be ported by
  each platform are still in platform.h but this file has been
  moved to /include/plat/common since this can be shared by all
  platforms.

Change-Id: Ieb3bb22fbab3ee8027413c6b39a783534aee474a

Reduce the number of header files included from other header
files as much as possible without splitting the files. Use forward
declarations where possible. This allows removal of some unnecessary
"#ifndef __ASSEMBLY__" statements.

Also, review the .c and .S files for which header files really need
including and reorder the #include statements alphabetically.

Fixes ARM-software/tf-issues#31

Change-Id: Iec92fb976334c77453e010b60bcf56f3be72bd3e

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