drm/plane-helper: Fixup mismerge

I somehow manage to screw up applying Laurent's patch in eca93e28c256:
"drm: Check in setcrtc if the primary plane supports the fb pixel
format". It was a conflict with

commit 3461b30b
Author: Daniel Vetter <daniel.vetter@ffwll.ch>
Date:   Thu Mar 5 10:32:44 2015 +0100

    drm/plane-helper: unexport drm_primary_helper_create_plane

and I just didn't check that the solution from wiggle made sense.

Cc: Dan Carpenter <dan.carpenter@oracle.com>
Cc: laurent.pinchart@ideasonboard.com
Reported-by: Dan Carpenter <dan.carpenter@oracle.com>
Acked-by: laurent.pinchart@ideasonboard.com
Signed-off-by: Daniel Vetter <daniel.vetter@intel.com>

drivers/gpu/drm/drm_plane_helper.c

@@ -353,12 +353,13 @@ static struct drm_plane *create_primary_plane(struct drm_device *dev)
 	if (primary == NULL) {
 		DRM_DEBUG_KMS("Failed to allocate primary plane\n");
 		return NULL;
+	}
+
 	/*
 	 * Remove the format_default field from drm_plane when dropping
 	 * this helper.
 	 */
 	primary->format_default = true;
-	}
 
 	/* possible_crtc's will be filled in later by crtc_init */
 	ret = drm_universal_plane_init(dev, primary, 0,