Added the test for nRF52840-DK board with MCUBoot variant.
Images based on MCUBoot may be used for test automation since this
bootloader type does not have version dependencies.
To prepare the board for testing it should be flashed with MCUBoot
image variant with `nrfjprog` initially.
Install or downgrade firmware on all devices to make the system match
a well known set. This allows two things:
* Factory recovery where a device in the field has been upgraded
* Ensuring a consistent set of tested firmware for a specific workload
A tag is assigned either during upload or added post-upload on the LVFS
which is included in the metadata. A single firmware can be marked with
multiple tags, and tags can be duplicated for different firmwares.
This allows us to override the location we load data files from, which
allows us to do more kinds of installed tests in the future.
Also, move the global data/tests content into the place that it is used
as it was getting impossible to manage.
Now two plugins are using hardcoded SPI constants for various CFI chips,
and it makes sense to have some common quirk data that can be used by
both.
Add a FuSpiChip helper object that can be used by FuDevice subclasses
to get the specific SPI commands to use for each flash ID.
99.9999% of users are consuming firmware updates from the LVFS or
another trusted remote. It's far too easy to get a user to enter the
password to install an untrusted firmware, where the security
consequences are pretty dire.
Provide an escape-hatch for firmware engineers, but it does mean
editing a file in /etc as root. This seems like an acceptable level of
inconvenience.
