drm: probe_helper: Hide ugly ifdef

Push the ifdef to the drm_edid.h and create a stub, for the
DRM_LOAD_EDID_FIRMWARE=n case. This removes some clutter in
the code, making it more readable.

Signed-off-by: Ezequiel Garcia <[e-mail]>
Reviewed-by: Jani Nikula <[e-mail]>
Signed-off-by: Daniel Vetter <[e-mail]>
Link: http://patchwork.freedesktop.org/patch/msgid/[e-mail]

drivers/gpu/drm/drm_probe_helper.c

···
 		count = drm_add_edid_modes(connector, edid);
 		drm_edid_to_eld(connector, edid);
 	} else {
-#ifdef CONFIG_DRM_LOAD_EDID_FIRMWARE
 		count = drm_load_edid_firmware(connector);
 		if (count == 0)
-#endif
 			count = (*connector_funcs->get_modes)(connector);
 	}
 

include/drm/drm_edid.h

···
 int drm_av_sync_delay(struct drm_connector *connector,
 		      const struct drm_display_mode *mode);
 struct drm_connector *drm_select_eld(struct drm_encoder *encoder);
+
+#ifdef CONFIG_DRM_LOAD_EDID_FIRMWARE
 int drm_load_edid_firmware(struct drm_connector *connector);
+#else
+static inline int drm_load_edid_firmware(struct drm_connector *connector)
+{
+	return 0;
+}
+#endif
 
 int
 drm_hdmi_avi_infoframe_from_display_mode(struct hdmi_avi_infoframe *frame,