[coreboot-gerrit] Patch merged into coreboot/master: northbridge/amd/amdmct: Clear memory before enabling ECC

the following patch was just integrated into master:
commit 7fd3ef57cba80f8ef2e9ecc500124e1e56d05325
Author: Timothy Pearson 
Date:   Sat Jun 20 20:02:49 2015 -0500

northbridge/amd/amdmct: Clear memory before enabling ECC

The existing code enabled ECC before clearing memory.  As the
    AMD CPUs will generate MCEs on any invalid check bits, this
    resulted in random lockups during memory training due to the
    uniniailized check bits.

Initialize ECC check bits before enabling ECC hardware.

Change-Id: I992e7040520570893ba6a213138dd57bfa14733b
    Signed-off-by: Timothy Pearson 
    Reviewed-on: http://review.coreboot.org/11996
    Tested-by: build bot (Jenkins)
    Reviewed-by: Martin Roth

See http://review.coreboot.org/11996 for details.

-gerrit