Patch merged into coreboot/master: nb/intel/x4x: Fix memory hole with both channels populated

the following patch was just integrated into master:
commit 9fb08f55a86467ba1a36d4f5e6196a77b534778d
Author: Damien Zammit 
Date:   Fri Jan 22 18:56:23 2016 +1100

nb/intel/x4x: Fix memory hole with both channels populated

Previously, 0xa0000000 to 0xc0000000 needed to be reserved as
    a non-usable memory hole because it would hang on memory i/o.

Memtest86+ now passes with no errors on both channels populated.
    Tested on GA-G41M-ES2L with 2x2GiB sticks of ram.

Change-Id: Ib52a63a80f5f69c16841f10ddb896ab3c7d30462
    Signed-off-by: Damien Zammit 
    Reviewed-on: https://review.coreboot.org/13125
    Reviewed-by: Aaron Durbin 
    Tested-by: build bot (Jenkins)

See https://review.coreboot.org/13125 for details.

-gerrit