update: consolidated flat device tree code

[Hollis Blanchard]

Changes:
- converted some ints to "unsigned", since gcc was generating warnings
and negative lengths don't make sense in the flat data structure.
- added ft_set_prop(), which doesn't yet resize properties but will in
the future.
- added an explicit copyright statement.

Still haven't looked to merge Matt's changes (because I'm busy, the
current code works for me, and they haven't been accepted in u-boot
yet).

Current users: Xen
Future users: Mark's Linux bootwrapper code
Potential users: kexec, u-boot

-- 
Hollis Blanchard
IBM Linux Technology Center
-------------- next part --------------
A non-text attachment was scrubbed...
Name: ft_build.c
Type: text/x-csrc
Size: 12119 bytes
Desc: not available
URL: <http://lists.ozlabs.org/pipermail/linuxppc-dev/attachments/20060817/62e3842d/attachment.c>
-------------- next part --------------
A non-text attachment was scrubbed...
Name: ft_build.h
Type: text/x-chdr
Size: 4373 bytes
Desc: not available
URL: <http://lists.ozlabs.org/pipermail/linuxppc-dev/attachments/20060817/62e3842d/attachment.h>