Signed-off-by: Iblis Lin <e196819@hotmail.com>

mkits.sh help currently shows dtb file as optional, but generates an
invalid its file when this option is unspecified.

We're fixing this problem by removing the use of the sed command and
just including variables instead.

Signed-off-by: Mathieu Olivari <mathieu@qca.qualcomm.com>

SVN-Revision: 45659

Signed-off-by: Luka Perkov <luka@openwrt.org>

SVN-Revision: 38430

SVN-Revision: 36753

SVN-Revision: 19094