switch ->is_visible() to returning umode_t

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
diff --git a/drivers/hwmon/max6650.c b/drivers/hwmon/max6650.c
index ece3aaf..2fc034a 100644
--- a/drivers/hwmon/max6650.c
+++ b/drivers/hwmon/max6650.c
@@ -464,7 +464,7 @@
 static SENSOR_DEVICE_ATTR(gpio2_alarm, S_IRUGO, get_alarm, NULL,
 			  MAX6650_ALRM_GPIO2);
 
-static mode_t max6650_attrs_visible(struct kobject *kobj, struct attribute *a,
+static umode_t max6650_attrs_visible(struct kobject *kobj, struct attribute *a,
 				    int n)
 {
 	struct device *dev = container_of(kobj, struct device, kobj);