ARM: S5PV310: Update CMU registers for CPUFREQ

This patch adds CMU(Clock Management Unit) registers for S5PV310/S5PC210
CPUFREQ driver and modifies some register names according to datasheet.

Signed-off-by: Sunyoung Kang <sy0816.kang@samsung.com>
Signed-off-by: Kukjin Kim <kgene.kim@samsung.com>