cpufreq: Move governor-per-policy parsing before parsing freq table

Even if all CPUs share same frequency table, there might still be use
case where governor-per-policy is useful. Move it before returning
from parsing common CPU freq table.

Change-Id: I0254dd4d09b6ea6595a183207da036b224c90f04
Signed-off-by: Junjie Wu <junjiew@codeaurora.org>