PCI Hotplug: fix up the permission settings on a few of the sysfs files.

Thanks to Linda Xie for pointing this out.

drivers/pci/hotplug/pci_hotplug_core.c

@@ -292,7 +292,7 @@ static ssize_t latch_read_file (struct hotplug_slot *slot, char *buf)
 }
 
 static struct hotplug_slot_attribute hotplug_slot_attr_latch = {
-	.attr = {.name = "latch", .mode = S_IFREG | S_IRUGO | S_IWUSR},
+	.attr = {.name = "latch", .mode = S_IFREG | S_IRUGO},
 	.show = latch_read_file,
 };
 
@@ -311,7 +311,7 @@ static ssize_t presence_read_file (struct hotplug_slot *slot, char *buf)
 }
 
 static struct hotplug_slot_attribute hotplug_slot_attr_presence = {
-	.attr = {.name = "adapter", .mode = S_IFREG | S_IRUGO | S_IWUSR},
+	.attr = {.name = "adapter", .mode = S_IFREG | S_IRUGO},
 	.show = presence_read_file,
 };
 
@@ -361,7 +361,7 @@ static ssize_t max_bus_speed_read_file (struct hotplug_slot *slot, char *buf)
 }
 
 static struct hotplug_slot_attribute hotplug_slot_attr_max_bus_speed = {
-	.attr = {.name = "max_bus_speed", .mode = S_IFREG | S_IRUGO | S_IWUSR},
+	.attr = {.name = "max_bus_speed", .mode = S_IFREG | S_IRUGO},
 	.show = max_bus_speed_read_file,
 };
 
@@ -387,7 +387,7 @@ static ssize_t cur_bus_speed_read_file (struct hotplug_slot *slot, char *buf)
 }
 
 static struct hotplug_slot_attribute hotplug_slot_attr_cur_bus_speed = {
-	.attr = {.name = "cur_bus_speed", .mode = S_IFREG | S_IRUGO | S_IWUSR},
+	.attr = {.name = "cur_bus_speed", .mode = S_IFREG | S_IRUGO},
 	.show = cur_bus_speed_read_file,
 };