Patch merged into coreboot/master: 8644207 armv7/exynos5420: Add output ability and half-duplex mode in SPI driver.

the following patch was just integrated into master:
commit 864420766ad85c8ed0dd98aefd8f527aeb506aa5
Author: Hung-Te Lin 
Date:   Wed Jun 26 20:29:06 2013 +0800

armv7/exynos5420: Add output ability and half-duplex mode in SPI driver.

The SPI driver (exynos_spi_rx_tx) was implemented with only "read" ability and
    only full-duplex mode. To communicate with devices like ChromeOS EC, we need
    both output (tx) and half-duplex (searching frame header) features.

This commit adds a spi_rx_tx that can handle all cases we need.

Change-Id: I6aba3839eb0711d49c143dc0620245c0dfe782d8
    Signed-off-by: Hung-Te Lin 
    Signed-off-by: Gabe Black 
    Reviewed-on: http://review.coreboot.org/3713
    Tested-by: build bot (Jenkins)
    Reviewed-by: Stefan Reinauer

See http://review.coreboot.org/3713 for details.

-gerrit