V4L/DVB (10509): saa7134-video: two int controls lack a step

Fix two broken controls where a step weren't specified. Without a step,
userspace apps won't allow to adjust such controls.
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>

drivers/media/video/saa7134/saa7134-video.c

@@ -452,6 +452,7 @@ static const struct v4l2_queryctrl video_ctrls[] = {
 		.name          = "y offset odd field",
 		.minimum       = 0,
 		.maximum       = 128,
+		.step          = 1,
 		.default_value = 0,
 		.type          = V4L2_CTRL_TYPE_INTEGER,
 	},{
@@ -459,6 +460,7 @@ static const struct v4l2_queryctrl video_ctrls[] = {
 		.name          = "y offset even field",
 		.minimum       = 0,
 		.maximum       = 128,
+		.step          = 1,
 		.default_value = 0,
 		.type          = V4L2_CTRL_TYPE_INTEGER,
 	},{