drm/msm/dp: Update msm_dp_controller IDs for sa8775p

drm/msm/dp: Update msm_dp_controller IDs for sa8775p

The Qualcomm SA8775P platform comes with 2 DisplayPort controllers
for each mdss. Update controller id for DPTX0 and DPTX1 of mdss1.

Fixes: dcb380d19e58 ("drm/msm/dp: Add DisplayPort controller for SA8775P")
Signed-off-by: Mani Chandana Ballary Kuntumalla <quic_mkuntuma@quicinc.com>
Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@oss.qualcomm.com>
Patchwork: https://patchwork.freedesktop.org/patch/690234/
Link: https://lore.kernel.org/r/20251125105622.1755651-2-quic_mkuntuma@quicinc.com
Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@oss.qualcomm.com>