ARM: S3C64XX: declare the states with the new api on cpuidle

The states are now part of the cpuidle_driver structure, so we can
declare the states in this structure directly. That saves us an extra
variable declaration and a memcpy.

Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
Tested-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Signed-off-by: Kukjin Kim <kgene.kim@samsung.com>