BugLink: http://bugs.launchpad.net/bugs/1591802

SGX presence is related to a SKL power workaround,
so lets show when that is enabled.
Signed-off-by: Len Brown <len.brown@intel.com>
(cherry picked from commit aa8d8cc7)
Signed-off-by: Tim Gardner <tim.gardner@canonical.com>
Acked-by: Brad Figg <brad.figg@canonical.com>
Acked-by: Kamal Mostafa <kamal@canonical.com>