Kernel v4.15 added support for native enumeration of Thunderbolt
topology. The enumeration mode affects both the BIOS and TBT FW
operation so they must agree on it. Platforms may support both modes,
native and "legacy" (or "BIOS-assist").
This change makes sure the new image is compatible with the current
controller mode (otherwise the BIOS and TBT FW will not be alligned on
it at least until next boot) and also adds a new GUID generation logic
for a controller in "native" mode so LVFS could contain 2 images, one for
the "legacy" mode and one for "native".
Signed-off-by: Yehezkel Bernat <yehezkel.bernat@intel.com>
