Remove the dummy driver dependency on X11
Remove the dummy driver dependency on X11

Otherwise when x11 is disabled, it can't be compiled correctly.

Signed-off-by: Zhao Yakui <21bae65ecea50a19bd9d0fef489914760189fd5b@intel.com>

pma1/libva,pma1/libva,chenxianqin/vaapi-libva,01org/libva-cros,zzhhui/libva,01org/libva-cros,01org/iotg-lin-gfx-libva,zzhhui/libva,chenxianqin/vaapi-libva,gbeauchesne/libva,zzhhui/libva,pma1/libva,01org/iotg-lin-gfx-libva,gbeauchesne/libva,01org/libva-cros,01org/iotg-lin-gfx-libva,chenxianqin/vaapi-libva,gbeauchesne/libva