OPP: Remove dev_pm_opp_find_freq_ceil_by_volt()

This was added few years back, but the code that was supposed to use it
never got merged. Remove the unused helper.

Tested-by: Dmitry Osipenko <dmitry.osipenko@collabora.com>
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
2 files changed