If a disk has a bootable partition we are expected to use it to locate the
boot files. Add a function to find it.
To test this, update mmc1 to have two paritions, fixing up other tests
accordingly.
Signed-off-by: Simon Glass <sjg@chromium.org>
Add a test which checks that two operating systems can be displayed in a
menu, allowing one to be selected.
Enable a few things on snow so that the unit tests build.
Signed-off-by: Simon Glass <sjg@chromium.org>
We need to create a disk image with a partition table and a DOS-format
filesystem containing a few files. Provide a fallback binary for CI since
it does not seem able to detect the loopback partitions.
Add this to a dm_init test so that it happens when needed.
Signed-off-by: Simon Glass <sjg@chromium.org>
