drm/i915/tgl: Add mipi dsi support for TGL

Most of the functions and mipi dsi sequence remains
same as of ICL for TGL. Hence extending the support
to TGL.
Signed-off-by: Vandita Kulkarni <vandita.kulkarni@intel.com>
Reviewed-by: Uma Shankar <uma.shankar@intel.com>
Signed-off-by: Uma Shankar <uma.shankar@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20190730073648.5157-6-vandita.kulkarni@intel.com

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

@@ -15319,6 +15319,7 @@ static void intel_setup_outputs(struct drm_i915_private *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 (IS_ELKHARTLAKE(dev_priv)) {
 		intel_ddi_init(dev_priv, PORT_A);
 		intel_ddi_init(dev_priv, PORT_B);