Besides D0 device state we need the proper power wells to be on on
some platforms, so get the port power domain reference instead of an RPM
reference.
Signed-off-by: NImre Deak <imre.deak@intel.com>
Reviewed-by: NAntti Koskipää <antti.koskipaa@linux.intel.com>
Signed-off-by: NDaniel Vetter <daniel.vetter@ffwll.ch>