cpufreq: ondemandplus: adapt to the get cpu idle time function changes.

Signed-off-by: Dan Trifan <jimsth@gmail.com>
Revert "ondemandplus governor: remove adaptive timer_rate logic"

This reverts commit d88feb605aa9c43a80860c8866968a1ee722d110.

Signed-off-by: Dan Trifan <jimsth@gmail.com>
cpufreq: ondemandplus: add missing else if

There is no need to check for a frequency decrease if an
increase has already been initialized. Must have forgot
the 'else' a long time ago and never noticed it. Anyway,
it's only a slight code improvement.

Signed-off-by: Dan Trifan <jimsth@gmail.com>