[PATCH v2 00/41] Reorganize setup code and merge 32 and 64-bit setup_arch()

[Benjamin Herrenschmidt]

This series reorganizes the setup code, moving probe_machine() later than
when it's currently done, and sync'ing 32-bit and 64-bit enough to merge
their implementations of setup_arch(). We get rid of ppc64 setup_system()
which is subsumed by the new setup_arch().

Note: The first 2 patches could go separately. The first one is a pre
requisite for the ppc32 move of probe_machine(). The second one a general
bug fix for recent kernels which I included here so my test kernels
could build but the rest of the series doesn't depend on it.

Finally I added a few more random build fixes at the end.