drm/i915/dp: Use connector DSC DPCD in intel_dp_dsc_compute_config()

Use the connector's DSC DPCD capabilities in
intel_dp_dsc_compute_config().
Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Signed-off-by: Imre Deak <imre.deak@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20231006133727.1822579-18-imre.deak@intel.com

drivers/gpu/drm/i915/display/intel_dp.c

@@ -2150,7 +2150,7 @@ int intel_dp_dsc_compute_config(struct intel_dp *intel_dp,
 	/* Calculate Slice count */
 	if (intel_dp_is_edp(intel_dp)) {
 		pipe_config->dsc.slice_count =
-			drm_dp_dsc_sink_max_slice_count(intel_dp->dsc_dpcd,
+			drm_dp_dsc_sink_max_slice_count(connector->dp.dsc_dpcd,
 							true);
 		if (!pipe_config->dsc.slice_count) {
 			drm_dbg_kms(&dev_priv->drm, "Unsupported Slice Count %d\n",