hwmon: (iio_hwmon) Drop bogus __refdata annotation

As the IIO hardware monitoring driver does not have any code or data
located in initmem, there is no need to annotate the iio_hwmon_driver
structure with __refdata.  Drop the annotation, to avoid suppressing
future section warnings.
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Link: https://lore.kernel.org/r/20201211133512.2969952-1-geert+renesas@glider.beSigned-off-by: Guenter Roeck <linux@roeck-us.net>

drivers/hwmon/iio_hwmon.c

@@ -169,7 +169,7 @@ static const struct of_device_id iio_hwmon_of_match[] = {
 };
 MODULE_DEVICE_TABLE(of, iio_hwmon_of_match);
 
-static struct platform_driver __refdata iio_hwmon_driver = {
+static struct platform_driver iio_hwmon_driver = {
 	.driver = {
 		.name = "iio_hwmon",
 		.of_match_table = iio_hwmon_of_match,