qHD is a resolution (960x540 pixels) - Super AMOLED is a display technology. A Super AMOLED screen could be qHD, it could be HD, it could be anything.
I think what you are asking is "Can a qHD display be changed to use HD resolution?" - and the answer is "No". A LCD/AMOLED/IPS/<insert other mobile screen tech here> screen uses 1:1 pixel mapping. On a qHD screen, there are 518,400 pixel triads. On an HD screen (1280x720) there are 921,600 pixel triads. A build.prop edit cannot physically add pixels to a display.
Hope this is a better answer than the decidedly unhelpful answer posted above.
deduct, the OP may be asking a serious question. Not everyone understands these things like some of us do. If you cannot give an intelligent, well worded answer; please do not answer at all. It just clutters up the thread and confuses the OP, who already seems confused.