CHROMIUM: MALI: Don't require opp-hz-real when there is a single clock

It does not seem useful to introduce another redudant (and
non-upstream) entry in the device tree, especially if there is
only a single clock.

BUG=b:149806107
TEST=boot kukui

Change-Id: I065126860e03c386a00daff223806a3bceaa2812
Signed-off-by: Nicolas Boichat <drinkcat@chromium.org>
1 file changed