commands/*: Replace license and copyright boilerplate by SPDX identfiers ...

While at it also drop references to the non-existing CREDITS file and do
some small rearrangements for some uniform formatting.
(SPDX-License-Identifier first, then copyright texts and then an empty
line.)

The advantage is that these specifiers are machine-parseable which helps
license conformance.

Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

commands: unify newlines for options ...

The BAREBOX_CMD_HELP_OPT macro adds a newline to the string, but users
of the macro inconsistently add another newline resulting in empty
newlines for some commands, but not for others. Remove any newline in
the description and rely on BAREBOX_CMD_HELP_OPT for the formatting.

Signed-off-by: Michael Tretter <m.tretter@pengutronix.de>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

commands: of_dump: Add description for -n option ...

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

of_dump: Add option to print node names only ...

Devicetrees tend to become very long and it is hard to find the
interesting nodes in a full tree output.
This patch adds the -n option to the of_node command. With this
option only the names of the nodes are printed, but not the properties.
The resulting output is much shorter and the node one is interested
in can be copy/pasted to a second call to of_node.

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

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>