crypto: ghash - remove checks for key being set

Now that the crypto API prevents a keyed hash from being used without
setting the key, there's no need for GHASH to do this check itself.
Signed-off-by: Eric Biggers <ebiggers@google.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

crypto/ghash-generic.c

@@ -56,9 +56,6 @@ static int ghash_update(struct shash_desc *desc,
 	struct ghash_ctx *ctx = crypto_shash_ctx(desc->tfm);
 	u8 *dst = dctx->buffer;
 
-	if (!ctx->gf128)
-		return -ENOKEY;
-
 	if (dctx->bytes) {
 		int n = min(srclen, dctx->bytes);
 		u8 *pos = dst + (GHASH_BLOCK_SIZE - dctx->bytes);
@@ -111,9 +108,6 @@ static int ghash_final(struct shash_desc *desc, u8 *dst)
 	struct ghash_ctx *ctx = crypto_shash_ctx(desc->tfm);
 	u8 *buf = dctx->buffer;
 
-	if (!ctx->gf128)
-		return -ENOKEY;
-
 	ghash_flush(ctx, dctx);
 	memcpy(dst, buf, GHASH_BLOCK_SIZE);