Patch merged into coreboot/master: 6f9947a baytrail: enable caching and prefetching in spi controller

the following patch was just integrated into master:
commit 6f9947a3ec2cf481dbb233660a29f757a8707cf8
Author: Aaron Durbin 
Date:   Mon Nov 18 11:16:20 2013 -0600

baytrail: enable caching and prefetching in spi controller

The default mode of the SPI controller has prefetching disabled.
    That obviously has a performance impact. Enable both caching
    and prefetching to make booting faster. This has a significant
    impact on streaming data out of SPI.

BUG=chrome-os-partner:24085
    BRANCH=None
    TEST=Built and booted rambi. Payload loading step went from ~285ms
         to ~54ms.

Change-Id: I065cf44e1de7dcefc49aa9ea9ad0204929ab26f4
    Signed-off-by: Aaron Durbin 
    Reviewed-on: https://chromium-review.googlesource.com/177220
    Reviewed-by: Shawn Nematbakhsh 
    Reviewed-on: http://review.coreboot.org/4976
    Tested-by: build bot (Jenkins)
    Reviewed-by: Patrick Georgi

See http://review.coreboot.org/4976 for details.

-gerrit