media: i2c: ov2640: simplify getting the adapter of a client

We have a dedicated pointer for that, so use it. Much easier to read and
less computation involved.
Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Reviewed-by: Simon Horman <horms+renesas@verge.net.au>
Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>

drivers/media/i2c/ov2640.c

@@ -1197,7 +1197,7 @@ static int ov2640_probe(struct i2c_client *client,
 			const struct i2c_device_id *did)
 {
 	struct ov2640_priv	*priv;
-	struct i2c_adapter	*adapter = to_i2c_adapter(client->dev.parent);
+	struct i2c_adapter	*adapter = client->adapter;
 	int			ret;
 
 	if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA)) {