hikey960: workaround: disable graphics driver preloading am: 99662b3e45

Original change: https://android-review.googlesource.com/c/device/linaro/hikey/+/2902255

Change-Id: I8ff3845a71736a2b1b3adda7e318f0f42652a8be
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>