msm: kgsl: Enable POPP at non-turbo levels

The POPP feature was disabled at non-turbo power levels.
Fix the condition to make it work at other levels as intended.

Change-Id: Ic45470e68880f233164787ed0de41d98031fa4ad
Signed-off-by: Lynus Vaz <lvaz@codeaurora.org>
Signed-off-by: Lucille Sylvester <lsylvest@codeaurora.org>