switch ->is_visible() to returning umode_t

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
diff --git a/drivers/input/touchscreen/ad7877.c b/drivers/input/touchscreen/ad7877.c
index 400131d..baa43df 100644
--- a/drivers/input/touchscreen/ad7877.c
+++ b/drivers/input/touchscreen/ad7877.c
@@ -612,10 +612,10 @@
 	NULL
 };
 
-static mode_t ad7877_attr_is_visible(struct kobject *kobj,
+static umode_t ad7877_attr_is_visible(struct kobject *kobj,
 				     struct attribute *attr, int n)
 {
-	mode_t mode = attr->mode;
+	umode_t mode = attr->mode;
 
 	if (attr == &dev_attr_aux3.attr) {
 		if (gpio3)