[E09][DTS] use correct video ports and remove configuration of vop2 plane mask from overlays

Do not assign vop2 planes to vp0/vp1 in the dts.

Because all planes have to be assigned to a video port (otherwise some video ports stop working), this creates conflicts between overlays and they cannot be applied together.

After df3d7e53, the driver automatically assigns the correct planes to the video ports that are currently enabled, so this commit remove the assignment from the dts overlays.

Also, use vp0 for hdmi and vp1 for edp/lvds to allow combining them.