crypto: virtio/akcipher - Do not use GFP_ATOMIC when not needed

There is no need to use GFP_ATOMIC here. GFP_KERNEL is already used for
another memory allocation just the line after.
Signed-off-by: Christophe JAILLET <christophe.jaillet@wanadoo.fr>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

drivers/crypto/virtio/virtio_crypto_akcipher_algs.c

@@ -116,7 +116,7 @@ static int virtio_crypto_alg_akcipher_init_session(struct virtio_crypto_akcipher
 	struct virtio_crypto_session_input *input;
 	struct virtio_crypto_ctrl_request *vc_ctrl_req;
 
-	pkey = kmemdup(key, keylen, GFP_ATOMIC);
+	pkey = kmemdup(key, keylen, GFP_KERNEL);
 	if (!pkey)
 		return -ENOMEM;