[ARM] smp: separate SCU support code from realview

Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig
index ef4f860..f19a951 100644
--- a/arch/arm/Kconfig
+++ b/arch/arm/Kconfig
@@ -861,6 +861,7 @@
 	depends on EXPERIMENTAL && (REALVIEW_EB_ARM11MP || MACH_REALVIEW_PB11MP)
 	depends on GENERIC_CLOCKEVENTS
 	select USE_GENERIC_SMP_HELPERS
+	select HAVE_ARM_SCU if ARCH_REALVIEW
 	help
 	  This enables support for systems with more than one CPU. If you have
 	  a system with only one CPU, like most personal computers, say N. If
@@ -878,6 +879,12 @@
 
 	  If you don't know what to do here, say N.
 
+config HAVE_ARM_SCU
+	bool
+	depends on SMP
+	help
+	  This option enables support for the ARM system coherency unit
+
 choice
 	prompt "Memory split"
 	default VMSPLIT_3G