drm fb helper: remove unused variable crtc_id

crtc_id is set but never used, so remove it from struct
drm_fb_helper_crtc.

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
Signed-off-by: Dave Airlie <airlied@redhat.com>
diff --git a/drivers/gpu/drm/drm_fb_helper.c b/drivers/gpu/drm/drm_fb_helper.c
index 7b37874..7740dd2 100644
--- a/drivers/gpu/drm/drm_fb_helper.c
+++ b/drivers/gpu/drm/drm_fb_helper.c
@@ -417,7 +417,6 @@
 
 	i = 0;
 	list_for_each_entry(crtc, &dev->mode_config.crtc_list, head) {
-		fb_helper->crtc_info[i].crtc_id = crtc->base.id;
 		fb_helper->crtc_info[i].mode_set.crtc = crtc;
 		i++;
 	}
diff --git a/include/drm/drm_fb_helper.h b/include/drm/drm_fb_helper.h
index 55e10d6..5120b01 100644
--- a/include/drm/drm_fb_helper.h
+++ b/include/drm/drm_fb_helper.h
@@ -35,7 +35,6 @@
 #include <linux/kgdb.h>
 
 struct drm_fb_helper_crtc {
-	uint32_t crtc_id;
 	struct drm_mode_set mode_set;
 	struct drm_display_mode *desired_mode;
 };