libsel4utils: Fix documentation bug

Update the documented order of the vspace_root parameter
so that it matches the function signature

Signed-off-by: Kent McLeod <kent@kry10.com>

libsel4utils/include/sel4utils/vspace.h

diff --git a/libsel4utils/include/sel4utils/vspace.h b/libsel4utils/include/sel4utils/vspace.h
index db24831..9422a79 100644
--- a/libsel4utils/include/sel4utils/vspace.h
+++ b/libsel4utils/include/sel4utils/vspace.h
@@ -192,9 +192,9 @@
  *
  * @param vspace                  uninitialised vspace struct to populate.
  * @param data                    uninitialised vspace data struct to populate.
+ * @param vspace_root             root object for the new vspace.
  * @param vka                     initialised vka that this virtual memory allocator will use to
  *                                allocate pages and pagetables. This allocator will never invoke free.
- * @param vspace_root             root object for the new vspace.
  * @param allocated_object_fn     function to call when objects are allocated. Can be null.
  * @param allocated_object_cookie cookie passed when the above function is called. Can be null.
  * @param existing_frames         a NULL terminated list of virtual addresses for 4K frames that are
@@ -216,10 +216,10 @@
  *
  * @param vspace                  uninitialised vspace struct to populate.
  * @param data                    uninitialised vspace data struct to populate.
+ * @param vspace_root             root object for the new vspace.
  * @param vka                     initialised vka that this virtual memory allocator will use to
  *                                allocate pages and pagetables. This allocator will never invoke free.
  * @param info                    seL4 boot info
- * @param vspace_root             root object for the new vspace.
  * @param allocated_object_fn     function to call when objects are allocated. Can be null.
  * @param allocated_object_cookie cookie passed when the above function is called. Can be null.
  *