CHROMIUM: MALI: Better framework to allow platform code to override devfreq

Depending on the platform, we require custom logic to handle devfreq.
The framework we used on r14p0 used 3 functions pointers, but we
can use a single one now (accepting a little bit of code duplication).

BUG=b:149806107
TEST=build kukui

Change-Id: I3b19abed242e5c1ca95338eafc93c4a35a5547b6
Signed-off-by: Nicolas Boichat <drinkcat@chromium.org>
3 files changed