iio: tcs3472: use ! instead of explicit NULL check

Replace 'if (indio_dev == NULL)' with 'if (!indio_dev)' in
tcs3472_probe() to follow the preferred kernel style.

No functional change.

Suggested-by: Joshua Crofts <joshua.crofts1@gmail.com>
Signed-off-by: Aldo Conte <aldocontelk@gmail.com>
Signed-off-by: Jonathan Cameron <jic23@kernel.org>

Author: aldocontelk

drivers/iio/light/tcs3472.c

@@ -452,7 +452,7 @@ static int tcs3472_probe(struct i2c_client *client)
 	int ret;
 
 	indio_dev = devm_iio_device_alloc(&client->dev, sizeof(*data));
-	if (indio_dev == NULL)
+	if (!indio_dev)
 		return -ENOMEM;
 
 	data = iio_priv(indio_dev);