ARM: S3C24XX: 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 9adc278..3f31f32 100644
--- a/arch/arm/Kconfig
+++ b/arch/arm/Kconfig
@@ -682,6 +682,7 @@
 	select GENERIC_GPIO
 	select ARCH_HAS_CPUFREQ
 	select HAVE_CLK
+	select CLKDEV_LOOKUP
 	select ARCH_USES_GETTIMEOFFSET
 	select HAVE_S3C2410_I2C if I2C
 	help