crypto: ghash-intel - Fix set but not used in ghash_async_setkey()

Signed-off-by: Gustavo F. Padovan <padovan@profusion.mobi>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

arch/x86/crypto/ghash-clmulni-intel_glue.c

@@ -245,7 +245,7 @@ static int ghash_async_setkey(struct crypto_ahash *tfm, const u8 *key,
 	crypto_ahash_set_flags(tfm, crypto_ahash_get_flags(child)
 			       & CRYPTO_TFM_RES_MASK);
 
-	return 0;
+	return err;
 }
 
 static int ghash_async_init_tfm(struct crypto_tfm *tfm)