pack.py: Added Kernel image packing using skales

lkboot doesn't understand FIT image and requires
kernel image to be packed using skales.

Change-Id: I27d746b459571fe15f837f08196a219fb1fa9082
Signed-off-by: Gokul Sriram Palanisamy <gokulsri@codeaurora.org>
2 files changed