staging: iio: ad9834: simplify -ENOMEM return in probe

devm_iio_device_alloc() failure returns -ENOMEM via a local variable
unnecessarily. Return -ENOMEM directly instead.

Signed-off-by: Angus Gardner <angusg778@gmail.com>
Reviewed-by: Maxwell Doose <m32285159@gmail.com>
Signed-off-by: Jonathan Cameron <jic23@kernel.org>

Author: Angus Gardner

drivers/staging/iio/frequency/ad9834.c

@@ -392,10 +392,8 @@ static int ad9834_probe(struct spi_device *spi)
 		return dev_err_probe(&spi->dev, ret, "Failed to enable specified AVDD supply\n");
 
 	indio_dev = devm_iio_device_alloc(&spi->dev, sizeof(*st));
-	if (!indio_dev) {
-		ret = -ENOMEM;
-		return ret;
-	}
+	if (!indio_dev)
+		return -ENOMEM;
 	st = iio_priv(indio_dev);
 	mutex_init(&st->lock);
 	st->mclk = devm_clk_get_enabled(&spi->dev, NULL);