UPSTREAM: PM: EM: Extend em_cpufreq_update_efficiencies() argument list

In order to prepare the code for the modifiable EM perf_state table,
make em_cpufreq_update_efficiencies() take a pointer to the EM table
as its second argument and modify it to use that new argument instead
of the 'table' member of dev->em_pd.

No functional impact.

Reviewed-by: Hongyan Xia <hongyan.xia2@arm.com>
Reviewed-by: Dietmar Eggemann <dietmar.eggemann@arm.com>
Tested-by: Dietmar Eggemann <dietmar.eggemann@arm.com>
Signed-off-by: Lukasz Luba <lukasz.luba@arm.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>

(cherry picked from commit e7b1cc9a)
Signed-off-by: Lukasz Luba <lukasz.luba@arm.com>
Change-Id: I961947811fa694b540b0eafacc6ea0bbaeb464c2