ARM: S5PC100: Add clkdev support

Signed-off-by: Thomas Abraham <thomas.ab@samsung.com>
Signed-off-by: Kukjin Kim <kgene.kim@samsung.com>
diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig
index 5635b87..96cfea4 100644
--- a/arch/arm/Kconfig
+++ b/arch/arm/Kconfig
@@ -739,6 +739,7 @@
 	bool "Samsung S5PC100"
 	select GENERIC_GPIO
 	select HAVE_CLK
+	select CLKDEV_LOOKUP
 	select CPU_V7
 	select ARM_L1_CACHE_SHIFT_6
 	select ARCH_USES_GETTIMEOFFSET