drm/i915/display: return earlier from intel_modeset_init() without display

!HAS_DISPLAY() implies !HAS_OVERLAY(), skipping overlay setup anyway, so
return earlier from intel_modeset_init() for clarity.

Cc: Ville Syrjälä <ville.syrjala@linux.intel.com>
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
Signed-off-by: Lucas De Marchi <lucas.demarchi@intel.com>
Reviewed-by: José Roberto de Souza <jose.souza@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20201106225531.920641-4-lucas.demarchi@intel.com
(cherry picked from commit 71c8415d0daa78ef1295743d0e11ba0214d0a9b9)
Signed-off-by: Rodrigo Vivi <rodrigo.vivi@intel.com>

Author: jnikula

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

@@ -18039,11 +18039,11 @@ int intel_modeset_init(struct drm_i915_private *i915)
 {
 	int ret;
 
-	intel_overlay_setup(i915);
-
 	if (!HAS_DISPLAY(i915))
 		return 0;
 
+	intel_overlay_setup(i915);
+
 	ret = intel_fbdev_init(&i915->drm);
 	if (ret)
 		return ret;