[PATCH 0 of 7] kvm-userspace: support multiple processors in the same architecture

[Hollis Blanchard <hollisb@us.ibm.com>]

These patches allow the kvmctl bits (including testcases and libcflat) to be
built for multiple processor types within the same architecture (e.g. 440 and
e500). This is important because PowerPC supervisor mode can contain
significant differences between processors (it's user mode that's more or less
identical).

For example, the data in a TLB entry and how to manipulate the TLB
are a major difference between 440 and e500, which is critical here because
libcflat must create its own mappings and so must know which method to use.

Some of the complexity comes from user/Makefile *not* using the top-level
config.mak, so we have to add some of the same logic to both configure scripts
to generate both config.mak files.

Too much makefile logic depends on ARCH containing only the architecture
name, so it was simpler to create and export a separate PROCESSOR variable.

-Hollis