media: media/i2c: don't return ENOTTY if SUBDEV_API is not set

If CONFIG_VIDEO_V4L2_SUBDEV_API is not set, then it is still possible
to call set_fmt for V4L2_SUBDEV_FORMAT_TRY, the result is just not
stored. So return 0 instead of -ENOTTY.

Calling get_fmt with V4L2_SUBDEV_FORMAT_TRY should return -EINVAL
instead of -ENOTTY, after all the get_fmt functionality is still
present, just not supported for TRY.

Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Acked-by: Lad, Prabhakar <prabhakar.csengg@gmail.com>
Acked-by: Rui Miguel Silva <rmfrfs@gmail.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>

drivers/media/i2c/ov2659.c

@@ -1055,7 +1055,7 @@ static int ov2659_get_fmt(struct v4l2_subdev *sd,
 		mutex_unlock(&ov2659->lock);
 		return 0;
 #else
-	return -ENOTTY;
+		return -EINVAL;
 #endif
 	}
 
@@ -1131,8 +1131,6 @@ static int ov2659_set_fmt(struct v4l2_subdev *sd,
 #ifdef CONFIG_VIDEO_V4L2_SUBDEV_API
 		mf = v4l2_subdev_get_try_format(sd, cfg, fmt->pad);
 		*mf = fmt->format;
-#else
-		ret = -ENOTTY;
 #endif
 	} else {
 		s64 val;