maple_tree: mtree_insert: fix typo in kernel-doc description of GFP flags

Replace FGP_FLAGS with GFP_FLAGS

Link: https://lkml.kernel.org/r/20230715084038.987955-1-rppt@kernel.orgSigned-off-by: Mike Rapoport (IBM) <rppt@kernel.org>
Reviewed-by: Liam R. Howlett <Liam.Howlett@oracle.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>

lib/maple_tree.c

@@ -6314,7 +6314,7 @@ EXPORT_SYMBOL(mtree_insert_range);
  * @mt: The maple tree
  * @index : The index to store the value
  * @entry: The entry to store
- * @gfp: The FGP_FLAGS to use for allocations.
+ * @gfp: The GFP_FLAGS to use for allocations.
  *
  * Return: 0 on success, -EEXISTS if the range is occupied, -EINVAL on invalid
  * request, -ENOMEM if memory could not be allocated.