- move flag CHANGED_CPU_FB_WRITE from gSP to gDP (code refactor)
- enable CHANGED_CPU_FB_WRITE on video init.
- disable CHANGED_CPU_FB_WRITE in process display list.
many pd roms and demos use cpu rendering only
now they are supported with default settings
also detectCFB=1 now isn't needed anymore for some games
Commit is based on changes made by purplemarshmallow in #536