media: tda1997x: Use bitwise or for setting subdev flags

Assigning subdev flags in probe() after v4l2_i2c_subdev_init() clears the
I2C flag set by that function. Fix this by using bitwise or instead.
Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>

drivers/media/i2c/tda1997x.c

@@ -2567,7 +2567,7 @@ static int tda1997x_probe(struct i2c_client *client,
 	snprintf(sd->name, sizeof(sd->name), "%s %d-%04x",
 		 id->name, i2c_adapter_id(client->adapter),
 		 client->addr);
-	sd->flags = V4L2_SUBDEV_FL_HAS_DEVNODE | V4L2_SUBDEV_FL_HAS_EVENTS;
+	sd->flags |= V4L2_SUBDEV_FL_HAS_DEVNODE | V4L2_SUBDEV_FL_HAS_EVENTS;
 	sd->entity.function = MEDIA_ENT_F_DTV_DECODER;
 	sd->entity.ops = &tda1997x_media_ops;