media: i2c: ov5648: remove unnecessary NULL check

The "mode_index == ARRAY_SIZE(ov5648_modes)" check ensures that we
exited the loop via a break statement so we know that "mode" must
be valid.  Delete this unnecessary NULL check.
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>

drivers/media/i2c/ov5648.c

@@ -2338,7 +2338,7 @@ static int ov5648_enum_frame_interval(struct v4l2_subdev *subdev,
 		}
 	}
 
-	if (mode_index == ARRAY_SIZE(ov5648_modes) || !mode)
+	if (mode_index == ARRAY_SIZE(ov5648_modes))
 		return -EINVAL;
 
 	switch (interval_enum->code) {