Import libfdt code from https://git.kernel.org/cgit/utils/dtc/dtc.git
tag "v1.4.2" commit ec02b34.
This version includes commit d0b3ab0,
which fixes a buffer overflow in fdt_offset_ptr().
Change-Id: I05a30511ea68417ee7ff26477da3f99e0bd4e06b
Signed-off-by: Antonio Nino Diaz <antonio.ninodiaz@arm.com>
