This makes perfect sense, because the 'initiator' starts the transaction and
the 'target' is the addressee of the transaction. Even the I²C spec defines the
'master' as 'initiating' the transaction.
This is the same nomenclature now used by the Glasgow project too.
Correctly attach into the alternate mode after the update has completed.
The vendor was appending two files to make LVFS distribution 'easier' but I'd
much rather use the same deliverables as Windows. This also allows us to
simplify the firmware loading.