RCPM is the Run Control and Power Management module performs all
device-level tasks associated with device run control and power
management.

Add this for freescale powerpc platform and layerscape platform.
Signed-off-by: NChenhui Zhao <chenhui.zhao@freescale.com>
Signed-off-by: NTang Yuantian <Yuantian.Tang@freescale.com>
Signed-off-by: NWang Dongsheng <dongsheng.wang@freescale.com>
[scottwood: s/pointer/phandle and "disabled" status from example]
Signed-off-by: NScott Wood <oss@buserror.net>