mtd: nand: fix typo in comment

Funny one :) "Heck" fits somehow, too, but I am sure it was meant to be "Check".
Signed-off-by: Wolfram Sang <w.sang@pengutronix.de>
Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@linux.intel.com>
Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>

drivers/mtd/nand/nand_base.c

@@ -2588,7 +2588,7 @@ int nand_erase_nand(struct mtd_info *mtd, struct erase_info *instr,
 	instr->state = MTD_ERASING;
 
 	while (len) {
-		/* Heck if we have a bad block, we do not erase bad blocks! */
+		/* Check if we have a bad block, we do not erase bad blocks! */
 		if (nand_block_checkbad(mtd, ((loff_t) page) <<
 					chip->page_shift, 0, allowbbt)) {
 			pr_warn("%s: attempt to erase a bad block at page 0x%08x\n",