drm/i915: Check for panel orientation quirks on eDP panels

So far we have only been calling
drm_connector_init_panel_orientation_property(), which checks for
panel orientation quirks in the drm_panel_orientation_quirks.c file,
for DSI panels as so far only devices with DSI panels have had panels
which are not mounted up right.

The new GPD win2 device uses a portrait screen in a landscape case,
so now we've a device with an eDP panel which needs the panel-orientation
property to let the fbcon code and userspace know that the image needs to
be fixed-up.

This commit makes intel_edp_init_connector() call
drm_connector_init_panel_orientation_property() so that the property
gets added.

Reported-and-tested-by: russianneuromancer@ya.ru
Reviewed-by: Jani Nikula <jani.nikula@intel.com>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20180909133457.10636-2-hdegoede@redhat.com

drivers/gpu/drm/i915/intel_dp.c

@@ -6490,6 +6490,10 @@ static bool intel_edp_init_connector(struct intel_dp *intel_dp,
 	intel_connector->panel.backlight.power = intel_edp_backlight_power;
 	intel_panel_setup_backlight(connector, pipe);
 
+	if (fixed_mode)
+		drm_connector_init_panel_orientation_property(
+			connector, fixed_mode->hdisplay, fixed_mode->vdisplay);
+
 	return true;
 
 out_vdd_off: