To have a more accurate idea about any suspend/resume issues we can
perform the s/r until various phases in the s/r sequence. This way we
can isolate the given problem as being a device driver, kernel core or
BIOS related issue. Actual subtests using these new s/r phases will be
added as follow-up.

While at it also add the freeze suspend target, it's something we also
would need to test.

Signed-off-by: Imre Deak <imre.deak@intel.com>