sched/doc: Fix stale em_pd_energy() reference in sched-energy

The scheduler energy-aware placement documentation refers to the
em_pd_energy() API, which was renamed to em_cpu_energy() in commit
f0b5694791 ("PM / EM: change name of em_pd_energy to em_cpu_energy").
Update the reference to the current name.

em_cpu_energy() is the EM helper that compute_energy() in
kernel/sched/fair.c calls to estimate a performance domain's energy
consumption (defined in include/linux/energy_model.h).

Sync the zh_CN translation, which carries the same stale name.

Signed-off-by: Liang Luo <luoliang@kylinos.cn>
Reviewed-by: Dongliang Mu <dzm91@hust.edu.cn>
Reviewed-by: Lukasz Luba <lukasz.luba@arm.com>
Reviewed-by: Alex Shi <alexs@kernel.org>
Signed-off-by: Jonathan Corbet <corbet@lwn.net>
Message-ID: <20260707085335.2942128-1-luoliang@kylinos.cn>

Documentation/scheduler/sched-energy.rst

@@ -141,7 +141,7 @@ in its previous activation.
 find_energy_efficient_cpu() uses compute_energy() to estimate what will be the
 energy consumed by the system if the waking task was migrated. compute_energy()
 looks at the current utilization landscape of the CPUs and adjusts it to
-'simulate' the task migration. The EM framework provides the em_pd_energy() API
+'simulate' the task migration. The EM framework provides the em_cpu_energy() API
 which computes the expected energy consumption of each performance domain for
 the given utilization landscape.
 

Documentation/translations/zh_CN/scheduler/sched-energy.rst

@@ -119,7 +119,7 @@ EAS覆盖了CFS的任务唤醒平衡代码。在唤醒平衡时，它使用平
 
 如果唤醒的任务被迁移，find_energy_efficient_cpu()使用compute_energy()来估算
 系统将消耗多少能量。compute_energy()检查各CPU当前的利用率情况，并尝试调整来
-“模拟”任务迁移。EM框架提供了API em_pd_energy()计算每个性能域在给定的利用率条件
+“模拟”任务迁移。EM框架提供了API em_cpu_energy()计算每个性能域在给定的利用率条件
 下的预期能量消耗。
 
 下面详细介绍一个优化能量消耗的任务放置决策的例子。