This ports the following barebox commit:

| commit 3b68dbc
| Author: Sascha Hauer <s.hauer@pengutronix.de>
| Date:   Mon Jul 15 15:28:55 2019 +0200
|
|     mtd: peb: Do not mark as bad in mtd_peb_torture()
|
|     Both the Kernel and mtd-utils have peb torture functions and both
|     do not mark the block as bad automatically. Instead, the caller
|     must mark the block as bad when -EIO is returned from the torture
|     function. Do the same in barebox. This is necessary as the UBI code
|     otherwise may mark a block as bad twice: Once indirectly in
|     mtd_peb_torture() and then directly afterwards.
|
|     Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

Signed-off-by: Ulrich Ölmann <u.oelmann@pengutronix.de>