[coreboot] Patch merged into coreboot/master: 857f723 SMM: Add option for SPI driver to be available in SMM

the following patch was just integrated into master:
commit 857f723d69b14fa52a3ab3c1c515d2303e75c8cb
Author: Duncan Laurie 
Date:   Sat Jun 23 16:53:57 2012 -0700

SMM: Add option for SPI driver to be available in SMM

- add Kconfig option for CONFIG_SPI_FLASH_SMM
    - compile subsystem and chip drivers for smm if enabled
    - change mdelay(1) to udelay(500) since mdelay is not defined
      in SMM and a 1ms delay is worth avoiding
    - make flash chip structure non-const so the probe function
      pointers can be relocated for use in TSEG
    - Make SMM PCI access possible in southbridge SPI code

Change-Id: Icfcbbe8e4e56658769d46af0b5bf6c79a6432641
    Signed-off-by: Duncan Laurie

Build-Tested: build bot (Jenkins) at Tue Jul 24 16:04:19 2012, giving +1
Reviewed-By: Ronald G. Minnich  at Tue Jul 24 23:44:40 2012, giving +2
See http://review.coreboot.org/1313 for details.

-gerrit