drm/msm/dpu: remove struct drm_dsc_config from struct msm_display_info

drm/msm/dpu: remove struct drm_dsc_config from struct msm_display_info

Since struct drm_dsc_config is stored at atomic_enable() instead
of display setup time during boot up, saving struct drm_dsc_config
at struct msm_display_info is not necessary. Lets drop the dsc member
from struct msm_display_info.

Changes in v4:
-- fix "Since" at commit text

Signed-off-by: Kuogee Hsieh <quic_khsieh@quicinc.com>
Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Patchwork: https://patchwork.freedesktop.org/patch/543866/
Link: https://lore.kernel.org/r/1687454686-10340-3-git-send-email-quic_khsieh@quicinc.com
Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>