It's possible a PM domain defines only one state and it does not need
a governor to work. For such case, a warning actually is not necessary.
Signed-off-by: NDong Aisheng <aisheng.dong@nxp.com>
Reviewed-by: NUlf Hansson <ulf.hansson@linaro.org>
Signed-off-by: NRafael J. Wysocki <rafael.j.wysocki@intel.com>