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Update the libfdt source files, the upstream commit is 73e0f143b73d
("libfdt: fdt_strerror(): Fix comparison warning").

This brings us the fixes for the signed/unsigned comparison warnings,
so platforms can enable -Wsign-compare now.

Change-Id: I303d891c82ffea0acefdde27289339db5ac5a289
Signed-off-by: Andre Przywara <andre.przywara@arm.com>

This version corresponds to the following commit <7be250b>
libfdt: Correct condition for reordering blocks

Also, updated the Juno romlib jumptable with fdt APIs.

Change-Id: Ib6d28c1aea81c2144a263958f0792cc4daea7a1f
Signed-off-by: Madhukar Pappireddy <madhukar.pappireddy@arm.com>

NOTE: __ASSEMBLY__ macro is now deprecated in favor of __ASSEMBLER__.

All common C compilers predefine a macro called __ASSEMBLER__ when
preprocessing a .S file. There is no reason for TF-A to define it's own
__ASSEMBLY__ macro for this purpose instead. To unify code with the
export headers (which use __ASSEMBLER__ to avoid one extra dependency),
let's deprecate __ASSEMBLY__ and switch the code base over to the
predefined standard.

Change-Id: Id7d0ec8cf330195da80499c68562b65cb5ab7417
Signed-off-by: Julius Werner <jwerner@chromium.org>

Version 1.4.7 introduces a big performance hit to functions that access
the FDT. Downgrade the library to version 1.4.6-9, before the changes
that introduce the problem. Version 1.4.6 isn't used because one of the
libfdt files (fdt_overlay.c) is missing the license header. This
problem is also fixed in 1.4.6-9.

This version corresponds to commit <aadd0b65c987> checks: centralize
printing of property names in failure messages.

Fixes ARM-software/tf-issues#643

Change-Id: I73c05f2b1f994bcdcc4366131ce0647553cdcfb8
Signed-off-by: Antonio Nino Diaz <antonio.ninodiaz@arm.com>

Change-Id: Iad7adaf0b16a3d086594cb3432210ac2c4e207f8
Signed-off-by: Antonio Nino Diaz <antonio.ninodiaz@arm.com>

The current version of libfdt (1.4.2) has been modified to integrate it
in this repository. In order to do a clean import it is needed to remove
the current version first.

Change-Id: I2cab8c8e5632280d282fa7a2f2339768a0ad1e0f
Signed-off-by: Antonio Nino Diaz <antonio.ninodiaz@arm.com>

Delete old version of libfdt at lib/libfdt. Move new libfdt API
headers to include/lib/libfdt and all other files to lib/libfdt.

Change-Id: I32b7888f1f20d62205310e363accbef169ad7b1b
Signed-off-by: Antonio Nino Diaz <antonio.ninodiaz@arm.com>

* Move libfdt API headers to include/lib/libfdt
* Add libfdt.mk helper makefile
* Remove unused libfdt files
* Minor changes to fdt.h and libfdt.h to make them C99 compliant
Co-Authored-By: Jens Wiklander <jens.wiklander@linaro.org>

Change-Id: I425842c2b111dcd5fb6908cc698064de4f77220e