crypto: inside-secure - fix the sha state length in hmac_sha1_setkey

A check is performed on the ipad/opad in the safexcel_hmac_sha1_setkey
function, but the index used by the loop doing it is wrong. It is
currently the size of the state array while it should be the size of a
sha1 state. This patch fixes it.

Fixes: 1b44c5a60c13 ("crypto: inside-secure - add SafeXcel EIP197 crypto engine driver")
Reported-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Antoine Tenart <antoine.tenart@free-electrons.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

drivers/crypto/inside-secure/safexcel_hash.c

@@ -883,7 +883,7 @@ static int safexcel_hmac_sha1_setkey(struct crypto_ahash *tfm, const u8 *key,
 	if (ret)
 		return ret;
 
-	for (i = 0; i < ARRAY_SIZE(istate.state); i++) {
+	for (i = 0; i < SHA1_DIGEST_SIZE / sizeof(u32); i++) {
 		if (ctx->ipad[i] != le32_to_cpu(istate.state[i]) ||
 		    ctx->opad[i] != le32_to_cpu(ostate.state[i])) {
 			ctx->base.needs_inv = true;