[coreboot] [patch] rs780 4GB memory issues

[Stefan Reinauer]

* Marc Jones <marcj303 at gmail.com> [110401 21:37]:

> Use TOM2 for highest sysmem setting for northbound memory routing (DMA). This fixes 4GB memory issues.
> 
> Signed-off-by: Marc Jones <marcj303 at gmail.com>
 
Acked-by: Stefan Reinauer <stefan.reinauer at coreboot.org>