Proposal for reorg of kernel directory

[Benjamin Herrenschmidt]

> To prevent bloating the kernel directory, I'd like to propose a
> reorganization of the ppc64 tree to look more like the ppc tree.
> This includes the creation of  "platforms" and "syslib" directories
> that would contain platform-specific code and non-platform-specific
> system code, respectively.

I'm not fan at all of kernel vs. syslib. Even on ppc32, and years after
the split, I still keep trying to get at files in the wrong directory ;)

platforms is ok.

Ben.