2. produce EFI_EDID_DISCOVERED_PROTOCOL and EFI_EDID_ACTIVE_PROTOCOL in CirrusLogic5430 module.
3. consume EFI_OVERRIDE_PROTOCOL in CirrusLogic5430 module.
4. setup video mode according to EDID information in CirrusLogic5430 module.
git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@4479 6f19259b-4bc3-4df7-8a09-765794883524