qe: move qe from arch/powerpc to drivers

[Timur Tabi]

On Wed, Aug 6, 2014 at 3:53 AM, qiang.zhao at freescale.com
<qiang.zhao at freescale.com> wrote:
>
> Actually qe is a kind of IP block, so in my opinion, it is proper to put it under driver/(just in my opinion).

The QE library is not a driver, however.  It doesn't register as a
driver with the kernel.

Scott suggests drivers/soc.  I'm not crazy about that, but I don't
maintain that code any more.