PM: domains: Support required OPPs in dev_pm_domain_attach_list()

In the multiple PM domain case we need platform code to specify the index
of the corresponding required OPP in DT for a device, which is what
*_opp_attach_genpd() is there to help us with.

However, attaching a device to its PM domains is in general better done
with dev_pm_domain_attach_list(). To avoid having two different ways to
manage this and to prepare for the removal of *_opp_attach_genpd(), let's
extend dev_pm_domain_attach|detach_list() to manage the required OPPs too.

Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Acked-by: Viresh Kumar <viresh.kumar@linaro.org>
Link: https://lore.kernel.org/r/20241002122232.194245-5-ulf.hansson@linaro.org

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