The board is advertised as having "AMD Dual Graphics technology support". That is not the same as traditional Crossfire. It basically means you can Crossfire a traditional GPU with the APU. Explained fully here:
http://www.pcworld.com/article/235064/gpu.html
If you want to run a Crossfire setup get a more powerful traditional CPU to push it. Also you are almost always better off with a single more powerful GPU than Crossfire or Sli. Not all games support a multi GPU setup and there is micro stuttering to deal with. With a multi monitor or very high resolution single monitor setup with 2 x high end cards being necessary you want a powerful CPU and not an APU that would bottleneck the cards.
Crossfire and Sli technologies are licensed from AMD and Nvidia. Meaning if the board supports it it will be advertised as such since the board manufacturer pays to include it.