Remove platform dependency in CCI-400 driver

* 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
diff --git a/plat/fvp/fvp_private.h b/plat/fvp/fvp_private.h
index 054baa8..2dcb327 100644
--- a/plat/fvp/fvp_private.h
+++ b/plat/fvp/fvp_private.h
@@ -77,7 +77,8 @@
 			   unsigned long);
 int fvp_config_setup(void);
 
-void fvp_cci_setup(void);
+void fvp_cci_init(void);
+void fvp_cci_enable(void);
 
 void fvp_gic_init(void);