drm/msm/dpu: remove DSC feature bit for PINGPONG on SDM630

drm/msm/dpu: remove DSC feature bit for PINGPONG on SDM630

The SDM630 platform doesn't have DSC blocks nor does have it DSC
registers in the PINGPONG block. Drop the DPU_PINGPONG_DSC feature bit
from the PINGPONG's feature mask, replacing PINGPONG_SDM845_MASK with
BIT(DPU_PINGPONG_DITHER).

Fixes: 7204df5e7e68 ("drm/msm/dpu: add support for SDM660 and SDM630 platforms")
Reported-by: Abhinav Kumar <quic_abhinavk@quicinc.com>
Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Reviewed-by: Abhinav Kumar <quic_abhinavk@quicinc.com>
Patchwork: https://patchwork.freedesktop.org/patch/640308/
Link: https://lore.kernel.org/r/20250301-dpu-fix-catalog-v2-5-498271be8b50@linaro.org
Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@oss.qualcomm.com>