iio: adc: ad7091r8: make ad7091r_init_info const

Add const qualifier to struct ad7091r_init_info ad7091r*_init_info. This
is read-only data so it can be made const.

Signed-off-by: David Lechner <dlechner@baylibre.com>
Link: https://patch.msgid.link/20250628-iio-const-data-4-v1-1-4e0f93c9cf83@baylibre.com
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>

Author: dlech

drivers/iio/adc/ad7091r8.c

@@ -206,22 +206,22 @@ static int ad7091r8_gpio_setup(struct ad7091r_state *st)
 	return 0;
 }
 
-static struct ad7091r_init_info ad7091r2_init_info = {
+static const struct ad7091r_init_info ad7091r2_init_info = {
 	.info_no_irq = &ad7091r8_infos[AD7091R2_INFO],
 	.regmap_config = &ad7091r2_reg_conf,
 	.init_adc_regmap = &ad7091r8_regmap_init,
 	.setup = &ad7091r8_gpio_setup
 };
 
-static struct ad7091r_init_info ad7091r4_init_info = {
+static const struct ad7091r_init_info ad7091r4_init_info = {
 	.info_no_irq = &ad7091r8_infos[AD7091R4_INFO],
 	.info_irq = &ad7091r8_infos[AD7091R4_INFO_IRQ],
 	.regmap_config = &ad7091r4_reg_conf,
 	.init_adc_regmap = &ad7091r8_regmap_init,
 	.setup = &ad7091r8_gpio_setup
 };
 
-static struct ad7091r_init_info ad7091r8_init_info = {
+static const struct ad7091r_init_info ad7091r8_init_info = {
 	.info_no_irq = &ad7091r8_infos[AD7091R8_INFO],
 	.info_irq = &ad7091r8_infos[AD7091R8_INFO_IRQ],
 	.regmap_config = &ad7091r8_reg_conf,