drm/msm/dp: replace DRM_DEBUG_DP marco with drm_dbg_dp

Since DRM_DEBUG_DP is deprecated in favor of drm_dbg_dp(NULL, ...),
this patch replace all DRM_DEBUG_DP with drm_dbg_dp().

Changes in v4:
-- replace (strucr drm_dev *)NULL with drm_dev

Signed-off-by: Kuogee Hsieh <quic_khsieh@quicinc.com>
Reviewed-by: Stephen Boyd <swboyd@chromium.org>
Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Patchwork: https://patchwork.freedesktop.org/patch/474870/
Link: https://lore.kernel.org/r/1645122930-23863-4-git-send-email-quic_khsieh@quicinc.com
[DB: fixed compilation of dp_bridge_detect() caused by previous patch]
Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>