Remove the unused but set variable tfm in cryptd_enqueue_request to fix
the following warning when building with 'W=1':
crypto/cryptd.c:125:21: warning: variable 'tfm' set but not used [-Wunused-but-set-variable]
Signed-off-by: Tobias Klauser <tklauser@distanz.ch>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
 {
        int cpu, err;
        struct cryptd_cpu_queue *cpu_queue;
-       struct crypto_tfm *tfm;
        atomic_t *refcnt;
        bool may_backlog;
 
        if (!atomic_read(refcnt))
                goto out_put_cpu;
 
-       tfm = request->tfm;
        atomic_inc(refcnt);
 
 out_put_cpu: