DO NOT MERGE: Add default display modes

Rpi3 can't get edid from some monitors. In those cases, we can
make them work by adding default display modes.

Bug: 65403744
Test: Rpi3 should display on 7" Pillow TFT monitor.
Change-Id: I32b0f12c4d0fef00ce1cd1aafbdd43b53a4370e2
3 files changed