This is nice in theory, until you need to look at the bootloader status of the
parent, or of a different device entirely. Handle this in plugins for the few
cases we care about and stop setting or clearing IS_BOOTLOADER manually just to
get the vfuncs to be run.
Note: I do not think we want to use cleanup() for attaching devices not in
bootloader states -- as cleanup is only run at the end of the composite update.
This works around a silicon errata which makes the existing 0xB0 chip reset
non-functional.
ALso, as VL10x and VL103 are so different now, use different `->attach()` and
`->detach()` implementations for code sanity.
Based on a patch by Sherlock Chu <SherlockChu@via-labs.com>, many thanks.
The logic was wrong; we should have been using command 0xB0 for attach back to
FW mode for both VL10x and VL103. Using a generic reset on VL103 always reset
the device back into bootloader mode as the ROM signatures were being written
by command 0xC0.
As now attach and detach have different code paths, there's no point having a
`FuVliDevice->reset()` vfunc, and so we can make everything a little simpler at
the same time.
If we say that the version format should be the same for the `version_lowest`
and the `version_bootloader` then it does not always make sense to set it at
the same time.
Moving the `version_format` to a standalone first-class property also means it
can be typically be set in the custom device `_init()` function, which means we
don't need to worry about *changing* ther version format as set by the USB and
UDev superclass helpers.
