[ARM] 4812/1: RealView: clockevents support for the RealView platforms

The patch updates the RealView code to the clockevents infrastructure.
The SMP support is implemented in subsequent patches. Based on the
Versatile implementation by Kevin Hilman.

Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig
index a2b7e4a..b82828e 100644
--- a/arch/arm/Kconfig
+++ b/arch/arm/Kconfig
@@ -169,6 +169,7 @@
 	select ARM_AMBA
 	select ICST307
 	select GENERIC_TIME
+	select GENERIC_CLOCKEVENTS
 	help
 	  This enables support for ARM Ltd RealView boards.