drm/msm/adreno: Switch to the common UBWC config struct

drm/msm/adreno: Switch to the common UBWC config struct

Now that Adreno specifics are out of the way, use the common config
(but leave the HBB hardcoding in place until that is wired up on the
other side).

Acked-by: Dmitry Baryshkov <dmitry.baryshkov@oss.qualcomm.com>
Signed-off-by: Konrad Dybcio <konrad.dybcio@oss.qualcomm.com>
Patchwork: https://patchwork.freedesktop.org/patch/660985/
Signed-off-by: Rob Clark <robin.clark@oss.qualcomm.com>