The cc_cipher_handle structure contains only a single member, and only
one instance exists.  Simplify the code and reduce memory consumption by
moving this member to struct cc_drvdata.
Signed-off-by: NGeert Uytterhoeven <geert+renesas@glider.be>
Signed-off-by: NHerbert Xu <herbert@gondor.apana.org.au>