Disable screen blanking and powersave on VT2 for factory (merge from ToT to R12 factory)

For non-factory systems with VT2 functionality this does NOT change
the blanking or powersave despite believing it would.

For factory, it does correctly disable powersave and blanking.

BUG=chrome-os-partner:2950
TEST=Cherry-picked from: http://codereview.chromium.org/6858004

Change-Id: I5b445e4a6773b5073f661e6a3d92b6d9becc63ca
1 file changed