switch udf to simple_fsync()

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

fs/udf/dir.c

@@ -210,5 +210,5 @@ const struct file_operations udf_dir_operations = {
 	.read			= generic_read_dir,
 	.readdir		= udf_readdir,
 	.ioctl			= udf_ioctl,
-	.fsync			= udf_fsync_file,
+	.fsync			= simple_fsync,
 };