plat/arm: allow boards to define PLAT_ARM_TZC_FILTERS

A TZC400 can have upto 4 filters and the number of filters instantiated
within a TZC400 is platform dependent. So allow platforms to define the
value of PLAT_ARM_TZC_FILTERS by moving the existing Juno specific
definition of PLAT_ARM_TZC_FILTERS to Juno board definitions.

Change-Id: I67a63d7336595bbfdce3163f9a9473e15e266f40
Signed-off-by: Suyash Pathak <suyash.pathak@arm.com>

include/plat/arm/css/common/css_def.h

@@ -189,9 +189,6 @@
 /* Load address of Non-Secure Image for CSS platform ports */
 #define PLAT_ARM_NS_IMAGE_BASE		U(0xE0000000)
 
-/* TZC related constants */
-#define PLAT_ARM_TZC_FILTERS		TZC_400_REGION_ATTR_FILTER_BIT_ALL
-
 /*
  * Parsing of CPU and Cluster states, as returned by 'Get CSS Power State' SCP
  * command

plat/arm/board/juno/include/platform_def.h

@@ -212,6 +212,9 @@
 		TZC_REGION_ACCESS_RDWR(TZC400_NSAID_GPU)	|	\
 		TZC_REGION_ACCESS_RDWR(TZC400_NSAID_CORESIGHT))
 
+/* TZC related constants */
+#define PLAT_ARM_TZC_FILTERS		TZC_400_REGION_ATTR_FILTER_BIT_ALL
+
 /*
  * Required ARM CSS based platform porting definitions
  */