configs: meson64: add alternate USB DFU boot target
Add boot over DFU RAM as an alternate to running script at
a fixed address like done today.
The main culprit is that it's not possible to do that
on G12A/Sm1 platforms due to changes in the USB boot protocol.
With this, U-Boot will present a DFU device with a ram slot where
the Host could write a fitImage or legacy U-Boot image, then with the
detach command boot will continue trying to boot the uploaded image.
Signed-off-by: Neil Armstrong <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Neil Armstrong <[email protected]>