uboot-phytec

tools/kwbimage: fix endianess issue

KWB image header values are in little endian (LE).
So adding appropriate cpu_to_leXX() calls to allow building those images
on BE hosts, too.

Signed-off-by: Reinhard Pfau <reinhard.pfau@gdsys.cc>
Reviewed-by: Stefan Roese <sr@denx.de>