barebox-state: get devicetree from file ...

Adds a -i/--input argument to barebox-state to allow passing a
devicetree as a file instead of using it from the system.
This can be used for example on systems that do not use device trees
(such as x86) but where we want to use a dtb blob for describing the
state storage and format.

Signed-off-by: Steffen Trumtrar <s.trumtrar@pengutronix.de>
Signed-off-by: Enrico Jorns <ejo@pengutronix.de>

barebox-state: implement skipping authentification (again) ...

Implement authentification again, this time wihtout the need of
passing a "force" argument through half of the function call stack.

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

barebox-state: make state_get() definition consistent to its prototype ...

In 2839d4f6f4 state_get() got an additional argument, but its prototype
in barebox-state.h was never adjusted. Include the file containing
the prototype from the file containing the function definition so that
this bug can be detected by the compiler. Also add the missing argument
to the callers.

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

barebox-state: make state_get() state_get_var() non static ...

Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>