switch ->is_visible() to returning umode_t

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
diff --git a/drivers/pci/pci-label.c b/drivers/pci/pci-label.c
index 81525ae..edaed6f 100644
--- a/drivers/pci/pci-label.c
+++ b/drivers/pci/pci-label.c
@@ -89,7 +89,7 @@
 	return 0;
 }
 
-static mode_t
+static umode_t
 smbios_instance_string_exist(struct kobject *kobj, struct attribute *attr,
 			     int n)
 {
@@ -275,7 +275,7 @@
 	return FALSE;
 }
 
-static mode_t
+static umode_t
 acpi_index_string_exist(struct kobject *kobj, struct attribute *attr, int n)
 {
 	struct device *dev;