Patch merged into coreboot/master: 93d9f92 spi: Change spi_xfer to work in units of bytes instead of bits.

the following patch was just integrated into master:
commit 93d9f92cfbb214718e211aee71ac869c77f725ee
Author: Gabe Black 
Date:   Thu Mar 27 21:52:43 2014 -0700

spi: Change spi_xfer to work in units of bytes instead of bits.

Whenever spi_xfer is called and whenver it's implemented, the natural unit for
    the amount of data being transfered is bytes. The API expected things to be
    expressed in bits, however, which led to a lot of multiplying and dividing by
    eight, and checkes to make sure things were multiples of eight. All of that
    can now be removed.

BUG=None
    TEST=Built and booted on link, falco, peach_pit and nyan and looked for SPI
    errors in the firmware log. Built for rambi.
    BRANCH=None

Change-Id: I02365bdb6960a35def7be7a0cd1aa0a2cc09392f
    Signed-off-by: Gabe Black 
    Reviewed-on: https://chromium-review.googlesource.com/192049
    Reviewed-by: Gabe Black 
    Tested-by: Gabe Black 
    Commit-Queue: Gabe Black 
    [km: cherry-pick from chromium]
    Signed-off-by: Kyösti Mälkki 
    Reviewed-on: http://review.coreboot.org/6175
    Tested-by: build bot (Jenkins)
    Reviewed-by: Edward O'Callaghan 
    Reviewed-by: Patrick Georgi

See http://review.coreboot.org/6175 for details.

-gerrit