drm/i915/ehl: EHL outputs are different from ICL

Configure the correct set of outputs for EHL. EHL has three DDI's
plus DSI.

Cc: Lucas De Marchi <lucas.demarchi@intel.com>
Signed-off-by: NBob Paauwe <bob.j.paauwe@intel.com>
Signed-off-by: NRodrigo Vivi <rodrigo.vivi@intel.com>
Reviewed-by: NLucas De Marchi <lucas.demarchi@intel.com>
Reviewed-by: NJosé Roberto de Souza <jose.souza@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20190322175847.25707-4-rodrigo.vivi@intel.com

drivers/gpu/drm/i915/intel_display.c

@@ -14713,7 +14713,12 @@ static void intel_setup_outputs(struct drm_i915_private *dev_priv)
 	if (!HAS_DISPLAY(dev_priv))
 		return;
 
-	if (INTEL_GEN(dev_priv) >= 11) {
+	if (IS_ELKHARTLAKE(dev_priv)) {
+		intel_ddi_init(dev_priv, PORT_A);
+		intel_ddi_init(dev_priv, PORT_B);
+		intel_ddi_init(dev_priv, PORT_C);
+		icl_dsi_init(dev_priv);
+	} else if (INTEL_GEN(dev_priv) >= 11) {
 		intel_ddi_init(dev_priv, PORT_A);
 		intel_ddi_init(dev_priv, PORT_B);
 		intel_ddi_init(dev_priv, PORT_C);