tree cf09ce097349aaadfe8b1e0e3a95b1854f3c02be
parent 98eb3233034c6dfd4c1bedb2d019392632f4a0af
author Cindy Liu <hcindyl@google.com> 1596147304 -0700
committer Cindy Liu <hcindyl@google.com> 1596239892 -0700

Flip the overlay logic.

The default dts will be 2GB memory configuration, and if EVT1 is
detected, the EVT1 config will be applied. This also helps with the dts
overlay failure case as the default would support EVT2+ memory config
moving forward.

Tested: Flash and boot both EVT1 and EVT2 boards. Chech the memory
allocation.

Change-Id: Ib9a400390b19f6cd6c3ce73282386c726ffe8b3d