commands: of_dump: Fix return value ...

In an error case the return value is set nicely
but 0 is always beeing returned.

Signed-off-by: Teresa Gámez <t.gamez@phytec.de>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

commands: of_dump switch to get fixed devictree ...

Add a switch to get the devicetree processed by the registered fixups.
This is also whats the kernel gets.

Signed-off-by: Jan Weitzel <j.weitzel@phytec.de>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

move file helper functions to separate file ...

We have our file helper functions in several places. Move them
all to lib/libfile.c.
With this we no longer have file helpers in fs/fs.c which contains
the core fs functions and no functions in lib/libbb.c which are
not from busybox.

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

Clean up Kconfig and source for a couple device tree commands. ...

Correct options listings for a couple device tree-related commands.

Signed-off-by: Robert P. J. Day <rpjday@crashcourse.ca>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

of: Drop devicetree merge support ...

I assume I am the only person knowing that barebox is able to
merge devicetrees. This feature seems broken for a while now since
trying to merge devicetress results in:

unflatten: too many end nodes

Remove this feature to save the complexity.

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

commands: add of_dump command ...

The oftree command is overloaded. This adds a dedicated command
which only dumps devicetrees to the console so that the corresponding
functionality in the oftree command can be removed in the next step.

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