drm/i915/dsi/xelpd: Enable mipi dsi support.

Enable MIPI DSI support on ADL-P platform.
The esc clock changes, WA changes are taken care
in the previous patches.
As per the Bspec the seq remains to be same as TGL.
Signed-off-by: Vandita Kulkarni <vandita.kulkarni@intel.com>
Reviewed-by: Jani Nikula <jani.nikula@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20210826054811.10572-3-vandita.kulkarni@intel.com

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

@@ -10853,6 +10853,7 @@ static void intel_setup_outputs(struct drm_i915_private *dev_priv)
 		intel_ddi_init(dev_priv, PORT_TC2);
 		intel_ddi_init(dev_priv, PORT_TC3);
 		intel_ddi_init(dev_priv, PORT_TC4);
+		icl_dsi_init(dev_priv);
 	} else if (IS_ALDERLAKE_S(dev_priv)) {
 		intel_ddi_init(dev_priv, PORT_A);
 		intel_ddi_init(dev_priv, PORT_TC1);