iio: ltr501: mark ltr501_chip_info as const

This patch marks the struct ltr501_chip_info as constant.
Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com>
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
Tested-by: Nikita Travkin <nikita@trvn.ru> # ltr559
Link: https://lore.kernel.org/r/20210610134619.2101372-5-mkl@pengutronix.deSigned-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>

drivers/iio/light/ltr501.c

@@ -152,7 +152,7 @@ struct ltr501_chip_info {
 struct ltr501_data {
 	struct i2c_client *client;
 	struct mutex lock_als, lock_ps;
-	struct ltr501_chip_info *chip_info;
+	const struct ltr501_chip_info *chip_info;
 	u8 als_contr, ps_contr;
 	int als_period, ps_period; /* period in micro seconds */
 	struct regmap *regmap;
@@ -739,7 +739,7 @@ static int ltr501_write_raw(struct iio_dev *indio_dev,
 {
 	struct ltr501_data *data = iio_priv(indio_dev);
 	int i, ret, freq_val, freq_val2;
-	struct ltr501_chip_info *info = data->chip_info;
+	const struct ltr501_chip_info *info = data->chip_info;
 
 	ret = iio_device_claim_direct_mode(indio_dev);
 	if (ret)
@@ -1086,7 +1086,7 @@ static ssize_t ltr501_show_proximity_scale_avail(struct device *dev,
 						 char *buf)
 {
 	struct ltr501_data *data = iio_priv(dev_to_iio_dev(dev));
-	struct ltr501_chip_info *info = data->chip_info;
+	const struct ltr501_chip_info *info = data->chip_info;
 	ssize_t len = 0;
 	int i;
 
@@ -1108,7 +1108,7 @@ static ssize_t ltr501_show_intensity_scale_avail(struct device *dev,
 						 char *buf)
 {
 	struct ltr501_data *data = iio_priv(dev_to_iio_dev(dev));
-	struct ltr501_chip_info *info = data->chip_info;
+	const struct ltr501_chip_info *info = data->chip_info;
 	ssize_t len = 0;
 	int i;
 
@@ -1188,7 +1188,7 @@ static const struct iio_info ltr301_info = {
 	.write_event_config	= &ltr501_write_event_config,
 };
 
-static struct ltr501_chip_info ltr501_chip_info_tbl[] = {
+static const struct ltr501_chip_info ltr501_chip_info_tbl[] = {
 	[ltr501] = {
 		.partid = 0x08,
 		.als_gain = ltr501_als_gain_tbl,