Make the S0 state be always reported as supported

Signed-off: Frans Pop <elendil@planet.nl>
Acked-by: NAlexey Starikovskiy <astarikovskiy@suse.de>
Signed-off-by: NRafael J. Wysocki <rjw@sisk.pl>
Signed-off-by: NLen Brown <len.brown@intel.com>