Allow the L2X0 outer cache support to be configurable

By default, this option was selected by the platform Kconfig. This
patch adds "depends on" to L2X0 so that it can be enabled/disabled
manually.
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>

arch/arm/mach-realview/Kconfig

@@ -10,7 +10,6 @@ config MACH_REALVIEW_EB
 config REALVIEW_EB_ARM11MP
 	bool "Support ARM11MPCore tile"
 	depends on MACH_REALVIEW_EB
-	select CACHE_L2X0
 	help
 	  Enable support for the ARM11MPCore tile on the Realview platform.
 
@@ -27,7 +26,6 @@ config REALVIEW_EB_ARM11MP_REVB
 config MACH_REALVIEW_PB11MP
 	bool "Support RealView/PB11MPCore platform"
 	select ARM_GIC
-	select CACHE_L2X0
 	help
 	  Include support for the ARM(R) RealView MPCore Platform Baseboard.
 	  PB11MPCore is a platform with an on-board ARM11MPCore and has
@@ -36,7 +34,6 @@ config MACH_REALVIEW_PB11MP
 config MACH_REALVIEW_PB1176
 	bool "Support RealView/PB1176 platform"
 	select ARM_GIC
-	select CACHE_L2X0
 	help
 	  Include support for the ARM(R) RealView ARM1176 Platform Baseboard.
 

arch/arm/mm/Kconfig

@@ -678,5 +678,9 @@ config OUTER_CACHE
 	default n
 
 config CACHE_L2X0
-	bool
+	bool "Enable the L2x0 outer cache controller"
+	depends on REALVIEW_EB_ARM11MP || MACH_REALVIEW_PB11MP || MACH_REALVIEW_PB1176
+	default y
 	select OUTER_CACHE
+	help
+	  This option enables the L2x0 PrimeCell.