This patch adds timer support for S5PV310.  Until now, all S5P SoCs
use CONFIG_ARCH_USES_GETTIMEOFFSET macro as a default configuration.
Instead,S5PV310 implements clocksource and clock_event_device to
support the high resolution timer and tickless system.
Signed-off-by: NChanghwan Youn <chaos.youn@samsung.com>
Signed-off-by: NHyuk Lee <hyuk1.lee@samsung.com>
Signed-off-by: NKukjin Kim <kgene.kim@samsung.com>