drivers: crypto: it8xxx2_evb: fix a shadow variable error

Fix a build error:

crypto_it8xxx2_sha.c:99:26: warning: declaration of 'i' shadows a
previous local [-Wshadow]
   99 |                 for (int i = 0; i < ARRAY_SIZE(sha256_k); i++) {
      |                          ^ crypto_it8xxx2_sha.c:88:13: note:
shadowed declaration is here
   88 |         int i;

Signed-off-by: Fabio Baltieri <[email protected]>

Author: fabiobaltieri

drivers/crypto/crypto_it8xxx2_sha.c

@@ -96,7 +96,7 @@ static void it8xxx2_sha256_init(bool init_k)
 	}
 	/* Initialize array of round constants */
 	if (init_k) {
-		for (int i = 0; i < ARRAY_SIZE(sha256_k); i++) {
+		for (i = 0; i < ARRAY_SIZE(sha256_k); i++) {
 			chip_ctx.k[i] = sha256_k[i];
 		}
 	}