iio: srf08: Remove redundant if statement

(!val) has been checked outside the loop, remove redundant (val &&)
from loop.
Signed-off-by: Li Zhengyu <lizhengyu3@huawei.com>
Acked-by: Andreas Klinger <ak@it-klinger.de>
Link: https://lore.kernel.org/r/20220523122755.90638-1-lizhengyu3@huawei.comSigned-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>

drivers/iio/proximity/srf08.c

@@ -354,7 +354,7 @@ static ssize_t srf08_write_sensitivity(struct srf08_data *data,
 		return -EINVAL;
 
 	for (i = 0; i < data->chip_info->num_sensitivity_avail; i++)
-		if (val && (val == data->chip_info->sensitivity_avail[i])) {
+		if (val == data->chip_info->sensitivity_avail[i]) {
 			regval = i;
 			break;
 		}