md/raid5: cast chunk_sectors to sector_t value

Currently, raid5 calculates dev_sectors from chunk_sectors without
proper cast, which is problematic.
Signed-off-by: Guoqing Jiang <guoqing.jiang@cloud.ionos.com>
Signed-off-by: Song Liu <songliubraving@fb.com>

drivers/md/raid5.c

@@ -7661,7 +7661,7 @@ static int raid5_run(struct mddev *mddev)
 	}
 
 	/* device size must be a multiple of chunk size */
-	mddev->dev_sectors &= ~(mddev->chunk_sectors - 1);
+	mddev->dev_sectors &= ~((sector_t)mddev->chunk_sectors - 1);
 	mddev->resync_max_sectors = mddev->dev_sectors;
 
 	if (mddev->degraded > dirty_parity_disks &&