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>

of: fdt: reorder fdt_header initialization ...

No functional change, just reorder the initialization of
the different offset/size members of fdt_header in increasing
order to make it easier to read.

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

of: fdt: Fix fdt size_dt_struct ...

size_dt_struct was calculated too big, we have to substract ofs.

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

of: parse phandles during unflatten ...

With this node->phandle becomes valid after unflattening a tree
and not during of_probe later.

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

of: fix merge mode in of_unflatten_dtb ...

In merge mode a property may be overwritte with new values. When
this happens the length has to be adjusted.

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

OF: base: rename of_free to of_delete_node ...

of_free is misleading about the actual purpose of the function. There is
already a of_create_node counterpart, so rename of_free to of_create_node
and update all users accordingly.

Signed-off-by: Sebastian Hesselbarth <sebastian.hesselbarth@gmail.com>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

OF: base: remove of_find_child_by_name ...

With of_get_child_by_name from Linux API, we can now convert and remove
of_find_child_by_name.

Signed-off-by: Sebastian Hesselbarth <sebastian.hesselbarth@gmail.com>

OF: base: sync of_find_property with linux OF API ...

To start synchronizing OF API of barebox with linux OF API, this adds
a length pointer to of_find_property. Also all current users of that
function are updated to reflect the API change.

Signed-off-by: Sebastian Hesselbarth <sebastian.hesselbarth@gmail.com>

fdt: Fix dt memreserve entry ...

The fdt reserve map needs address/size values, not address/end values
like accidently done for generating the reserve entry for the dt.

Reported-by: Jürgen Beisert <j.beisert@pengutronix.de>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

of: remove unused libfdt ...

Now that we are completely independent of libfdt remove the unused
code.

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

of: Add reservemap handling ...

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

of: move flat devicetree functions to separate file ...

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