Fix the Display problem on raspberrypi3 with 64 bits kernel.

Fix the Display problem on raspberrypi3 with 64 bits kernel.

When booting in arm64 kernel, the vc4 driver has error.
The errors are:
vc4-drm soc:gpu: failed to bind 3f902000.hdmi (ops vc4_hdmi_ops [vc4]): -517
vc4-drm soc:gpu: master bind failed: -517

This is because the duplicate dtb of vc4-kms-v3d, which are overlays/vc4-kms-v3d-overlay.dtb and overlays/vc4-kms-v3d.dtbo.
So I remove overlays/vc4-kms-v3d-overlay.dtb and keep overlays/vc4-kms-v3d.dtbo, then the problem solved.

Change-Id: I15e22de95d8ea3e9ba4e0f48ba075051588984e3
Signed-off-by: Che-Hao Liu <genesisgardian@gmail.com>