crypto: talitos - Fix build error by selecting LIB_DES

The talitos driver needs to select LIB_DES as it needs calls
des_expand_key.

Fixes: 9d574ae8 ("crypto: talitos/des - switch to new...")
Cc: <stable@vger.kernel.org>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Acked-by: Ard Biesheuvel <ardb@kernel.org>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>