Paulo Zanoni authored Aug 19, 2013 and Daniel Vetter committed Aug 20, 2013

This test chekcs our code that enables Package C8+. The environment
requirements for this test are quite complicated:
  - The machine needs to be properly configured to reach PC8+ when
    possible, which means all the power management policies and device
    drivers must be properly configured.
  - You need at least one output connected.
  - You need the /dev/cpu/0/msr file available.
  - You need the /dev/i2c-* files available.

v2: - Many many changes due to the latest review comments and rebase.

Signed-off-by: Paulo Zanoni <paulo.r.zanoni@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>