ANDROID: GKI: arm64: gki_defconfig: follow-up to removing DRM_MSM driver

These configs are selected by CONFIG_DRM_MSM. Explicitly add them now
that CONFIG_DRM_MSM isn't auto-selected.

Signed-off-by: Will McVicker <willmcvicker@google.com>
Bug: 147895101
Test: compile, verify the ABI is updated
Test: verify the module is loaded on the reference device
Change-Id: I084f785010ce85be4841d59e0809f844b26baeff