> Now I get a little bit confused....ARM is relasing planning Cortex-A17 (over A12) ...
> ....ok..A12 has no big.LITTLE...

In order to ease the confusion, ARM has decided 2 months ago that there's no A12 anymore and has merged it into A17:

http://community.arm.com/groups/processors/blog/2014/09/30/arm-cortex-a17-cortex-a12-processor-update