nb/i945/gma.c: Set the MSAC register correctly

This fixes an instability on 945gc where the IGD completely locks
up the system, when for instance tasked to do something with
compositing (like GNOME or GDM).

TESTED on ga-945gcm-s2l and d945gclf
TEST: launch GDM (gnome display manager)

Change-Id: Iec49bccf3e3164df9dc1e0b54460a616fe92e04d
Signed-off-by: Arthur Heymans <arthur@aheymans.xyz>
Reviewed-on: https://review.coreboot.org/17094
Reviewed-by: Nico Huber <nico.h@gmx.de>
Tested-by: build bot (Jenkins)

0 files changed, 0 insertions, 0 deletions