[media] media: videobuf2: fix compare_const_fl.cocci warnings

Move constants to the right of binary operators.

Generated by: scripts/coccinelle/misc/compare_const_fl.cocci

CC: Junghak Sung <jh1009.sung@samsung.com>
Signed-off-by: Fengguang Wu <fengguang.wu@intel.com>
Signed-off-by: Julia Lawall <julia.lawall@lip6.fr>
Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>

drivers/media/v4l2-core/videobuf2-v4l2.c

@@ -52,7 +52,7 @@ static int __verify_planes_array(struct vb2_buffer *vb, const struct v4l2_buffer
 		return 0;
 
 	/* Is memory for copying plane information present? */
-	if (NULL == b->m.planes) {
+	if (b->m.planes == NULL) {
 		dprintk(1, "multi-planar buffer passed but "
 			   "planes array not provided\n");
 		return -EINVAL;