[feature resquest] Hdmi-Cec support

[kodi-rc]

Please add Hdmi-Cec support, only compatible with some HDMI cables.

Example
on a Raspberry pi 3 I have LibreELEC with Kodi 18 I know it has CEC support.
So I can use the IR remote control on my TV to control the Kodi, just using an HDMI cable. Without having any other IR receiver plugged into the Raspberry pi

I don't know if Hdmi-Cec is supported by all graphics cards

note: see too: cec-utils and cec-client

note: libreelec [kodi] use Pulse-Eight/libcec
https://github.com/Pulse-Eight/libcec