staging:iio:ad2s1200 fix missing parenthesis in a for statment.

Signed-off-by: Jimmy Li <coder.liss@gmail.com>
Signed-off-by: Jonathan Cameron <jic23@kernel.org>

drivers/staging/iio/resolver/ad2s1200.c

@@ -107,14 +107,15 @@ static int ad2s1200_probe(struct spi_device *spi)
 	int pn, ret = 0;
 	unsigned short *pins = spi->dev.platform_data;
 
-	for (pn = 0; pn < AD2S1200_PN; pn++)
+	for (pn = 0; pn < AD2S1200_PN; pn++) {
 		ret = devm_gpio_request_one(&spi->dev, pins[pn], GPIOF_DIR_OUT,
 					    DRV_NAME);
 		if (ret) {
 			dev_err(&spi->dev, "request gpio pin %d failed\n",
 							pins[pn]);
 			return ret;
 		}
+	}
 	indio_dev = devm_iio_device_alloc(&spi->dev, sizeof(*st));
 	if (!indio_dev)
 		return -ENOMEM;