6R1M01R3 :
I think only the last gen of A10 APUs are compatible with Mantle, whenever it gets released.
Uhh... Mantle has already been released... If you have a compatible GPU (Or as you rightly said, A10 APU), you can simply select the Mantle API in the settings of supported games (e.g. BF4). Where you select it is in video settings, and the current setting will normally be DirectX 11 or similar