The Energy Model is able to use new power values coming from DT. Add a new
macro which is helpful in setting the .active_power() callback
conditionally in setup time. The dual-macro implementation handles both
kernel configurations: w/ EM and w/o EM built-in.
Reported-by: Nkernel test robot <lkp@intel.com>
Signed-off-by: NLukasz Luba <lukasz.luba@arm.com>
Signed-off-by: NViresh Kumar <viresh.kumar@linaro.org>