It is useful to be able to split an image into multiple sections,
each with its own size and position, for cases where a flash device has
read-only and read-write portions.
Add support for this.
Signed-off-by: Simon Glass <sjg@chromium.org>
We want to support multiple sections within a single image. To do this,
move most of the Image class implementation into a new Section class. An
Image contains only a single Section, but at some point we will support
a new 'section' entry, thus allowing Sections within Sections.
Use the name 'bsection' for the module so we can use 'section' for the
etype module.
Signed-off-by: Simon Glass <sjg@chromium.org>
