This ports the following barebox commit:

| commit 452a994
| Author: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
| Date:   Wed Sep 11 21:27:37 2019 +0200
|
|     state: drop unused code and declarations for non-existing functions
|
|     state_get_name() is not used and so can be removed.
|     state_backend_dtb_file() and state_backend_raw_file() were dropped in
|     c999b507da98 ("state: Refactor state framework").
|
|     Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
|     Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

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