Add 1920x1200 known mode and edid to test it

The known_modes timings did not include 1920x1200. Mostly this does
not matter because the monitor provides its own DTD with detailed
timing. But in the case where this is a fallback because we can't
do the higer res monitor timing it may be listed in the standard
modes section of the EDID. Add the CVT modeline for 1920x1200 to
the known_modes so this entry can be used. Add EDID with this
property to test EDIDs.

BUG=chromium-os:31265
TEST=Try on Dell U3011 and faked using -v -E6 -T1 flags

Change-Id: I9ad36f8c93b766e39b3178b346e4f5d84459d3f1
Reviewed-on: https://gerrit.chromium.org/gerrit/23655
Tested-by: Mark Hayter <mdhayter@chromium.org>
Reviewed-by: Todd Broch <tbroch@chromium.org>
Commit-Ready: Mark Hayter <mdhayter@chromium.org>
3 files changed