Enable CEC emulation support

configname: CONFIG_VIDEO_VIVID_CEC

Linux Kernel Configuration
└─>Device Drivers
└─>Multimedia support
└─>Media test drivers
└─>Enable CEC emulation support
In linux kernel since version 3.10 (release Date: 2013-06-30)  
When selected the vivid module will emulate the optional
HDMI CEC feature.