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_def.h b/plat/fvp/fvp_def.h
index b371ea9..dee2a19 100644
--- a/plat/fvp/fvp_def.h
+++ b/plat/fvp/fvp_def.h
@@ -184,11 +184,8 @@
  * CCI-400 related constants
  ******************************************************************************/
 #define CCI400_BASE			0x2c090000
-#define CCI400_SL_IFACE_CLUSTER0	3
-#define CCI400_SL_IFACE_CLUSTER1	4
-#define CCI400_SL_IFACE_INDEX(mpidr)	(mpidr & MPIDR_CLUSTER_MASK ? \
-					 CCI400_SL_IFACE_CLUSTER1 :   \
-					 CCI400_SL_IFACE_CLUSTER0)
+#define CCI400_SL_IFACE3_CLUSTER_IX	0
+#define CCI400_SL_IFACE4_CLUSTER_IX	1
 
 /*******************************************************************************
  * GIC-400 & interrupt handling related constants