staging: lustre: llite: drop uses of OBD free functions

Replace OBD_FREE and OBD_FREE_PTR by kfree.

The semantic patch that makes these changes is as follows:
(http://coccinelle.lip6.fr/

)

// <smpl>
@@
expression ptr, size;
@@

- OBD_FREE(ptr, size);
+ kfree(ptr);

@@
expression ptr;
@@

- OBD_FREE_PTR(ptr);
+ kfree(ptr);
// </smpl>

Signed-off-by: Julia Lawall <Julia.Lawall@lip6.fr>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>