media: atomisp-ov2680: properly set the vts value

The vts value should be set before being checked, as otherwise a
warning will arise:

	drivers/staging/media/atomisp/i2c/atomisp-ov2680.c: In function 'ov2680_set_fmt':
	drivers/staging/media/atomisp/i2c/atomisp-ov2680.c:873:33: warning: 'vts' may be used uninitialized
	[-Wmaybe-uninitialized]
	  873 |         if (dev->exposure > vts - OV2680_INTEGRATION_TIME_MARGIN)
Reported-by: Hans Verkuil <hverkuil@xs4all.nl>
Reviewed-by: Hans de Goede <hdegoede@redhat.com>
Fixes: 62b984359b6f ("media: atomisp-ov2680: Fix ov2680_set_fmt() messing up high exposure settings")
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>

drivers/staging/media/atomisp/i2c/atomisp-ov2680.c

@@ -869,11 +869,11 @@ static int ov2680_set_fmt(struct v4l2_subdev *sd,
 		dev_err(&client->dev,
 			"ov2680 write resolution register err: %d\n", ret);
 
+	vts = dev->res->lines_per_frame;
+
 	/* If necessary increase the VTS to match exposure + MARGIN */
 	if (dev->exposure > vts - OV2680_INTEGRATION_TIME_MARGIN)
 		vts = dev->exposure + OV2680_INTEGRATION_TIME_MARGIN;
-	else
-		vts = dev->res->lines_per_frame;
 
 	ret = ov2680_write_reg(client, 2, OV2680_TIMING_VTS_H, vts);
 	if (ret)