maple_tree: update copyright dates for test code

Add the span to the year of the development.

Link: https://lkml.kernel.org/r/[email protected]
Signed-off-by: Liam R. Howlett <[email protected]>
Cc: Matthew Wilcox <[email protected]>
Cc: Joe Perches <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>

Author: howlett

tools/testing/radix-tree/maple.c

@@ -1,7 +1,8 @@
 // SPDX-License-Identifier: GPL-2.0+
 /*
- * maple_tree.c: Userspace shim for maple tree test-suite
- * Copyright (c) 2018 Liam R. Howlett <[email protected]>
+ * maple_tree.c: Userspace testing for maple tree test-suite
+ * Copyright (c) 2018-2022 Oracle Corporation
+ * Author: Liam R. Howlett <[email protected]>
  *
  * Any tests that require internal knowledge of the tree or threads and other
  * difficult to handle in kernel tests.