[CRYPTO] Don't check for NULL before kfree()

Checking a pointer for NULL before calling kfree() on it is redundant.
This patch removes such checks from crypto/
Signed-off-by: Jesper Juhl <juhl-lkml@dif.dk>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: David S. Miller <davem@davemloft.net>

crypto/cipher.c

@@ -336,6 +336,5 @@ out:
 
 void crypto_exit_cipher_ops(struct crypto_tfm *tfm)
 {
-	if (tfm->crt_cipher.cit_iv)
 	kfree(tfm->crt_cipher.cit_iv);
 }

crypto/hmac.c

@@ -49,7 +49,6 @@ int crypto_alloc_hmac_block(struct crypto_tfm *tfm)
 
 void crypto_free_hmac_block(struct crypto_tfm *tfm)
 {
-	if (tfm->crt_digest.dit_hmac_block)
 	kfree(tfm->crt_digest.dit_hmac_block);
 }