hwmon: (iio_hwmon) Replace S_<PERMS> with octal values

Replace S_<PERMS> with octal values.

The conversion was done automatically with coccinelle. The semantic patches
and the scripts used to generate this commit log are available at
https://github.com/groeck/coccinelle-patches/hwmon/.

This patch does not introduce functional changes. It was verified by
compiling the old and new files and comparing text and data sizes.
Signed-off-by: Guenter Roeck <linux@roeck-us.net>

drivers/hwmon/iio_hwmon.c

@@ -129,7 +129,7 @@ static int iio_hwmon_probe(struct platform_device *pdev)
 			return -ENOMEM;
 
 		a->dev_attr.show = iio_hwmon_read_val;
-		a->dev_attr.attr.mode = S_IRUGO;
+		a->dev_attr.attr.mode = 0444;
 		a->index = i;
 		st->attrs[i] = &a->dev_attr.attr;
 	}