iio: light: tsl2583: constify i2c_device_id

i2c_device_id are not supposed to change at runtime. All functions
working with i2c_device_id provided by <linux/i2c.h> work with
const i2c_device_id. So mark the non-const structs as const.
Signed-off-by: Arvind Yadav <arvind.yadav.cs@gmail.com>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>

drivers/iio/light/tsl2583.c

@@ -924,7 +924,7 @@ static const struct dev_pm_ops tsl2583_pm_ops = {
 	SET_RUNTIME_PM_OPS(tsl2583_suspend, tsl2583_resume, NULL)
 };
 
-static struct i2c_device_id tsl2583_idtable[] = {
+static const struct i2c_device_id tsl2583_idtable[] = {
 	{ "tsl2580", 0 },
 	{ "tsl2581", 1 },
 	{ "tsl2583", 2 },