[coreboot-gerrit] Patch merged into coreboot/master: 6dc94c0 vboot: fix invalid check for the returned value from spi_flash->write

the following patch was just integrated into master:
commit 6dc94c068217f9ea55f84b60725fd4bbc258f7cb
Author: Daisuke Nojiri 
Date:   Wed Nov 12 14:01:23 2014 -0800

vboot: fix invalid check for the returned value from spi_flash->write

spi_flash->write returns non-zero on error and zero on success, not the
    number of bytes written.

BUG=none
    BRANCH=ToT
    TEST=Booted storm. Verified successfully nvdata was saved.

Original-Change-Id: If50cc1a62a4f06398d1830cca60085b6f925fff3
    Original-Signed-off-by: Daisuke Nojiri 
    Original-Reviewed-on: https://chromium-review.googlesource.com/229389
    Original-Reviewed-by: Aaron Durbin 
    Original-Reviewed-by: Randall Spangler

(cherry picked from commit 1e8cdbdb07e99c3f72c35f76d68144f46107acd9)
    Signed-off-by: Aaron Durbin

Change-Id: I216e97f734da8d4b52c2da8329f4143b7b0656cd
    Reviewed-on: http://review.coreboot.org/9439
    Reviewed-by: Patrick Georgi 
    Tested-by: build bot (Jenkins)

See http://review.coreboot.org/9439 for details.

-gerrit