crypto: cryptd - Remove unnecessary skcipher_request_zero

Previously the child skcipher request was stored on the stack and
therefore needed to be zeroed.  As it is now dynamically allocated
we no longer need to do so.

Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

crypto/cryptd.c

@@ -272,7 +272,6 @@ static void cryptd_skcipher_encrypt(struct crypto_async_request *base,
 				   req->iv);
 
 	err = crypto_skcipher_encrypt(subreq);
-	skcipher_request_zero(subreq);
 
 	req->base.complete = rctx->complete;
 
@@ -300,7 +299,6 @@ static void cryptd_skcipher_decrypt(struct crypto_async_request *base,
 				   req->iv);
 
 	err = crypto_skcipher_decrypt(subreq);
-	skcipher_request_zero(subreq);
 
 	req->base.complete = rctx->complete;