Remove compiler warning when no CONFIG_PM

arch/arm/mach-exynos4/time.c:209:
        warning: 'exynos4_pwm4_resume' defined but not used
Signed-off-by: NKyungmin Park <kyungmin.park@samsung.com>
Signed-off-by: NKukjin Kim <kgene.kim@samsung.com>

This patch updates HRT driver for supporting PM.
The resume function of PWM4 timer which is used clocksource is needed
when kernel is resuming for restarting.
Signed-off-by: NJaecheol Lee <jc.lee@samsung.com>
Signed-off-by: NKukjin Kim <kgene.kim@samsung.com>

This patch updates Timer part of EXYNOS4 according to the change of
ARCH name, EXYNOS4.
Signed-off-by: NKukjin Kim <kgene.kim@samsung.com>

In d7e81c26 (clocksource: Add clocksource_register_hz/khz interface) new
interfaces were added which simplify (and optimize) the selection of the
divisor shift/mult constants.  Switch over to using this new interface.
Acked-by: NKukjin Kim <kgene.kim@samsung.com>
Signed-off-by: NRussell King <rmk+kernel@arm.linux.org.uk>

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>