Patch merged into coreboot/master: northbridge/intel/gm45/Kconfig: Remove IOMMU symbol choice

the following patch was just integrated into master:
commit 4a666423c6d71614b7c2b539afa33d823c1896d5
Author: Martin Roth 
Date:   Tue Aug 25 17:04:59 2015 -0600

northbridge/intel/gm45/Kconfig: Remove IOMMU symbol choice

In the gm45 code, IOMMU is always selected to be enabled.  Instead
    this patch removes the Kconfig symbol and its dependencies.  This leads
    to the same effect without the need for the symbol.

The symbol is still used in the K8 code as it's not selected, simply
    defaulted to being enabled, and one of the mainboards disables it.

Change-Id: Ibc5939cd1e297d497bf71b1787d852f7cc09a551
    Signed-off-by: Martin Roth 
    Reviewed-on: http://review.coreboot.org/11345
    Reviewed-by: Patrick Georgi 
    Tested-by: build bot (Jenkins)
    Reviewed-by: Nico Huber

See http://review.coreboot.org/11345 for details.

-gerrit