Patch merged into coreboot/master: 558614d rk3288: Re-write spi_xfer() to support full duplex

the following patch was just integrated into master:
commit 558614d4d38d149865c2186802548eec55a03082
Author: David Hendricks 
Date:   Fri Sep 12 18:58:47 2014 -0700

rk3288: Re-write spi_xfer() to support full duplex

This change re-writes the spi_xfer() function to support full-duplex
    transfers.

Even though the code looks much different, the same basic algorithm
    for setting up the transfer is used. The main difference is that
    reads from rxdr and writes to txdr occur simultaneously and accounting
    is more complicated, so I separated the higher-level accounting
    portion from the low-level FIFO handling portion to simplify things.

BUG=chrome-os-partner:31850
    BRANCH=none
    TEST=Loaded content from SPI ROM fine, needs testing w/ EC

Change-Id: Ic109a02daf52ba694b63a73fec1a72b3c5c0fd71
    Signed-off-by: Patrick Georgi 
    Original-Commit-Id: 6a14f5ff8ed04d62e8de6ad2f468b763ffb8213c
    Original-Signed-off-by: David Hendricks 
    Original-Change-Id: I33d2f5179360baf94627c86b57d12f032897caf5
    Original-Reviewed-on: https://chromium-review.googlesource.com/218881
    Original-Reviewed-by: Julius Werner 
    Reviewed-on: http://review.coreboot.org/9338
    Tested-by: build bot (Jenkins)
    Reviewed-by: Stefan Reinauer

See http://review.coreboot.org/9338 for details.

-gerrit