drm/i915: Initialize panel_vdd_work only for eDP ports

It is only used by eDP ports so no need to initialize it for each DP
port.
Reviewed-by: NVille Syrjälä <ville.syrjala@linux.intel.com>
Signed-off-by: NJosé Roberto de Souza <jose.souza@intel.com>
Signed-off-by: NRodrigo Vivi <rodrigo.vivi@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20181030215750.28213-4-jose.souza@intel.com

drivers/gpu/drm/i915/intel_dp.c

@@ -6587,6 +6587,8 @@ static bool intel_edp_init_connector(struct intel_dp *intel_dp,
 	if (!intel_dp_is_edp(intel_dp))
 		return true;
 
+	INIT_DELAYED_WORK(&intel_dp->panel_vdd_work, edp_panel_vdd_work);
+
 	/*
 	 * On IBX/CPT we may get here with LVDS already registered. Since the
 	 * driver uses the only internal power sequencer available for both
@@ -6793,9 +6795,6 @@ intel_dp_init_connector(struct intel_digital_port *intel_dig_port,
 
 	intel_dp_aux_init(intel_dp);
 
-	INIT_DELAYED_WORK(&intel_dp->panel_vdd_work,
-			  edp_panel_vdd_work);
-
 	intel_connector_attach_encoder(intel_connector, intel_encoder);
 
 	if (HAS_DDI(dev_priv))