ARM: mmp: move XX_REG definition to addr-map.h

Move APBC_REG, APMU_REG and CIU_REG definition to addr-map.h
driver only need include addr-map.h to get access of the
registers.

Signed-off-by: Chao Xie <chao.xie@marvell.com>
Signed-off-by: Haojian Zhuang <haojian.zhuang@gmail.com>