scripts/dtc: Reenable fdtget ...

compilation of fdtget was lost during the update to version 1.4.6.
We need this tool internally for the build process when imd support
is enabled.

Apparently our dtc code comes from the Kernel which doesn't have the
upstream version of fdtget.c and it doesn't compile. This patch
changes fdtget.c to the upstream version as of 1.4.6. This isn't
noticed in the Kernel because fdtget isn't compiled there.

Fixes: 8a8982541 scripts/dtc: Update to upstream version 1.4.6

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

scripts/dtc: Update to upstream version 1.4.6 ...

Signed-off-by: Pascal Vizeli <pvizeli@syshack.ch>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

dtc: compile fdtget ...

We need fdtget in subsequent patches, so compile it.
Unfortunately this is not straight forward. fdtget needs libfdt,
but the Kernel Build System is not prepared for compiling
libraries for the host or binaries from files in multiple directories.
This patch moves the libfdt files to the dtc toplevel directory and
compiles fdtget as a binary from multiple source files but from
the same directory.

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

scripts: Add dtc ...

This adds the devicetree compiler to barebox. This is taken
without changes from Linux v3.8

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