Cleanup after first reviewing :
* Remove imx deinterlacing support : It will be reworked and submited later
  as a new PR with dedicated methods for imx deinterlacing
* class CDVDVideoCodecBuffer removed and specific
  CDVDVideoCodecIMXBuffer used
* Renaming of codecinfo to IMXBuffer
* Useless includes removed
* Remove the IMXFB define as linux/mxcfb.h is no longer used