drm/msm/a7xx: Fix LLC typo

We'd miss actually activating LLC.

Signed-off-by: Rob Clark <robdclark@chromium.org>
Reviewed-by: Konrad Dybcio <konrad.dybcio@linaro.org>
Fixes: af66706a ("drm/msm/a6xx: Add skeleton A7xx support")
Patchwork: https://patchwork.freedesktop.org/patch/573043/