The underlying issue breaking Spansion flash has been fixed with "mtd: spi-nor:
wait until lock/unlock operations are ready" and "mtd: spi-nor: wait for SR_WIP
to clear on initial unlock", so we can support unlocking for Winbond flash
again.
This is necessary to have writable flash on certain UBNT devices with some
bootloader versions.
Signed-off-by: Matthias Schiffer <mschiffer@universe-factory.net>
