cpufreq: Initialize cpufreq-dt driver earlier

This allows HW drivers that depend on cpufreq-dt to initialize earlier.

Signed-off-by: Amit Kucheria <amit.kucheria@linaro.org>
Acked-by: Viresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
Link: https://lore.kernel.org/r/353c745d4ca1feff600bd44154c01c013f185ca4.1571656015.git.amit.kucheria@linaro.org