[Bluetooth]: Fix section mismatch of bt_sysfs_cleanup()

The bt_sysfs_cleanup() is marked with __exit attribute, but it will
be called from an __init function in the error case. So the __exit
attribute must be removed.
Signed-off-by: Arnaud Patard <arnaud.patard@rtp-net.org>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
Signed-off-by: David S. Miller <davem@davemloft.net>

net/bluetooth/hci_sysfs.c

@@ -348,7 +348,7 @@ int __init bt_sysfs_init(void)
 	return 0;
 }
 
-void __exit bt_sysfs_cleanup(void)
+void bt_sysfs_cleanup(void)
 {
 	class_destroy(bt_class);