[coreboot-gerrit] Patch merged into coreboot/master: spi: Define and use spi_ctrlr structure

the following patch was just integrated into master:
commit 94f8699d447ef94df339d318b836b664273e89ff
Author: Furquan Shaikh 
Date:   Thu Dec 1 07:12:32 2016 -0800

spi: Define and use spi_ctrlr structure

1. Define a new structure spi_ctrlr that allows platforms to define
    callbacks for spi operations (claim bus, release bus, transfer).
    2. Add a new member (pointer to spi_ctrlr structure) in spi_slave
    structure which will be initialized by call to spi_setup_slave.
    3. Define spi_claim_bus, spi_release_bus and spi_xfer in spi-generic.c
    which will make appropriate calls to ctrlr functions.

BUG=chrome-os-partner:59832
    BRANCH=None
    TEST=Compiles successfully

Change-Id: Icb2326e3aab1e8f4bef53f553f82b3836358c55e
    Signed-off-by: Furquan Shaikh 
    Reviewed-on: https://review.coreboot.org/17684
    Tested-by: build bot (Jenkins)
    Reviewed-by: Aaron Durbin

See https://review.coreboot.org/17684 for details.

-gerrit