overlay: Prepare for multiple image types
More refactoring in preparation for ubi based mtd images.
Promote tar file generation to a real image_fstype. This allows tar
generation to be turned on or off as needed.
Move image-overlay function to image_types_phosphor. Perhaps phosphor
is not the best name but for now we only have a handful of image types and
the generation logic is to interdependant to warrant seperate classes
for each.
Attempt to improve readability throughout.
Drop ext4 override to discourage mtd block emulation.
Change-Id: Idbdc03444549b955ef2180622d133904cb191b28
Signed-off-by: Brad Bishop <bradleyb@fuzziesquirrel.com>
3 files changed