The SST25VF064C doesn't support the auto incrementing write which
all other supported SST chips support. Allow the chips to select
their write method.
Change-Id: Ic088d35461a625469ee6973d1267d7dd11963496
Signed-off-by: Alexander Couzens <lynxis@fe80.eu>
Reviewed-on: https://review.coreboot.org/14000
Tested-by: build bot (Jenkins)
Reviewed-by: Philipp Deppenwiese <zaolin.daisuki@googlemail.com>
Reviewed-by: Stefan Reinauer <stefan.reinauer@coreboot.org>
013accca7f