crypto: spacc - Fix off by one in spacc_isenabled()

The spacc->config.modes[] array has CRYPTO_MODE_LAST number of elements
so this > comparison should be >= to prevent an out of bounds access.

Fixes: c8981d92 ("crypto: spacc - Add SPAcc Skcipher support")
Signed-off-by: Dan Carpenter <dan.carpenter@linaro.org>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

drivers/crypto/dwc-spacc/spacc_core.c

@@ -1295,7 +1295,7 @@ int spacc_isenabled(struct spacc_device *spacc, int mode, int keysize)
 {
 	int x;
 
-	if (mode < 0 || mode > CRYPTO_MODE_LAST)
+	if (mode < 0 || mode >= CRYPTO_MODE_LAST)
 		return 0;
 
 	if (mode == CRYPTO_MODE_NULL    ||