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PM: EM: Fix incorrect description of the cost field in struct em_perf_state

Due to commit 1b600da51073 ("PM: EM: Optimize em_cpu_energy() and remove
division"), the logic for energy consumption calculation has been modified.
The actual calculation of cost is 10 * power * max_frequency / frequency
instead of power * max_frequency / frequency.

Therefore, the comment for cost has been updated to reflect the correct
content.

Fixes: 1b600da51073 ("PM: EM: Optimize em_cpu_energy() and remove division")
Signed-off-by: Yaxiong Tian <tianyaxiong@kylinos.cn>
Reviewed-by: Lukasz Luba <lukasz.luba@arm.com>
[ rjw: Added Fixes: tag ]
Link: https://patch.msgid.link/20251230061534.816894-1-tianyaxiong@kylinos.cn
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>

authored by

Yaxiong Tian and committed by
Rafael J. Wysocki 54b603f2 9ace4753

+1 -1
+1 -1
include/linux/energy_model.h
··· 18 18 * @power: The power consumed at this level (by 1 CPU or by a registered 19 19 * device). It can be a total power: static and dynamic. 20 20 * @cost: The cost coefficient associated with this level, used during 21 - * energy calculation. Equal to: power * max_frequency / frequency 21 + * energy calculation. Equal to: 10 * power * max_frequency / frequency 22 22 * @flags: see "em_perf_state flags" description below. 23 23 */ 24 24 struct em_perf_state {