mtd: rawnand: ingenic: cleanup ARRAY_SIZE() vs sizeof() use

The ARRAY_SIZE() is the number of elements but we want to use sizeof()
here for the number of bytes.  Fortunately, they are the same thing
because it's an array of u8 so this has no effect on runtime.

Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>
Link: https://lore.kernel.org/linux-mtd/20200624132640.GC9972@mwanda

drivers/mtd/nand/raw/ingenic/jz4740_ecc.c

@@ -90,8 +90,8 @@ static int jz4740_ecc_calculate(struct ingenic_ecc *ecc,
 	 * If the written data is completely 0xff, we also want to write 0xff as
 	 * ECC, otherwise we will get in trouble when doing subpage writes.
 	 */
-	if (memcmp(ecc_code, empty_block_ecc, ARRAY_SIZE(empty_block_ecc)) == 0)
-		memset(ecc_code, 0xff, ARRAY_SIZE(empty_block_ecc));
+	if (memcmp(ecc_code, empty_block_ecc, sizeof(empty_block_ecc)) == 0)
+		memset(ecc_code, 0xff, sizeof(empty_block_ecc));
 
 	return 0;
 }