This is the initial drop of the arm test framework and a first test
that just checks that setup completed (a selftest). kvm isn't needed
to run this test unless testing with smp > 1.

Try it out with
  yum install gcc-arm-linux-gnu
  export QEMU=[qemu with mach-virt and chr-testdev]
  ./configure --cross-prefix=arm-linux-gnu- --arch=arm
  make
  ./run_tests.sh

Signed-off-by: Andrew Jones <drjones@redhat.com>
Reviewed-by: Christoffer Dall <christoffer.dall@linaro.org>
---
v7:
  - remove memregions (reworked them as phys_alloc in lib/alloc)
  - selftest: non-functional change: s/argv[i]/var/
  - lib/argv:setup_args don't dereference NULL
v6:
  - fixed setup.c comment [Christoffer Dall]
  - changed arm/run to use chr-testdev instead of virtio-testdev
  - add align parameter to memregion_new, setup alloc_ops
v5:
  - memregions: check freemem_start is in bounds and document
  - selftest: rename testnam => testname and properly init it
  - io.c: use writeb instead of writel in puts() and use ioremap
  - arm/run script update for new qemu ('-device ?' now requires -machine)
  - couple other minor changes to setup.c and io.c [Christoffer Dall]
v4:
  - moved fdt to just after stacktop (it was in the middle of free memory)
  - switched from using heap to memregions
  - get nr_cpus and added smp=<num> test
  - added barrier.h
  - use new report()/report_summary()
  - config/config-arm.mak cleanup