mali: boost: take into account current opp when making low/high decision

before there could happen a situation where something (touchboost) could
set ape opp to 100, which would cause the mali_utilization seen by mali boost
to be lower and this in turn could cause mali ape_opp requirement to stay low,
when it should be set to high
Merge remote-tracking branch 'origin/mali_boost_impr' into 3.0.101
cpufreq: dynamic: sync sources with project Zen - v2.3