This was apparently never done before.. Program the expected values.

This also gets rid of sneakily setting that register through the HWCG
reg list on A690.
Signed-off-by: Konrad Dybcio <konrad.dybcio@linaro.org>
Patchwork: https://patchwork.freedesktop.org/patch/611098/Signed-off-by: Rob Clark <robdclark@chromium.org>